DS027 (v3.1) July 5, 2000
1
Product Specification
1-800-255-7778
© 2000 Xilinx, Inc. All rights reserved. All Xilinx trademarks, registered trademarks, patents, and disclaimers are as listed at
.
All other trademarks and registered trademarks are the property of their respective owners. All specifications are subject to change without notice.
Features
•
One-time programmable (OTP) read-only memory
designed to store configuration bitstreams of Xilinx
FPGA devices
•
Simple interface to the FPGA; requires only one user
I/O pin
•
Cascadable for storing longer or multiple bitstreams
•
Programmable reset polarity (active High or active
Low) for compatibility with different FPGA solutions
•
XC17128E/EL, XC17256E/EL, XC1701 and XC1700L
series support fast configuration
•
Low-power CMOS Floating Gate process
•
XC1700E series are available in 5V and 3.3V versions
•
XC1700L series are available in 3.3V only
•
Available in compact plastic packages: 8-pin SOIC,
8-pin VOIC, 8-pin PDIP, 20-pin SOIC, 20-pin PLCC,
44-pin PLCC or 44-pin VQFP.
•
Programming support by leading programmer
manufacturers.
•
Design support using the Xilinx Alliance and
Foundation series software packages.
•
Guaranteed 20 year life data retention
Description
The XC1700 family of configuration PROMs provides an
easy-to-use, cost-effective method for storing large Xilinx
FPGA configuration bitstreams.
When the FPGA is in Master Serial mode, it generates a
configuration clock that drives the PROM. A short access
time after the rising clock edge, data appears on the PROM
DATA output pin that is connected to the FPGA D
IN
pin. The
FPGA generates the appropriate number of clock pulses to
complete the configuration. Once configured, it disables the
PROM. When the FPGA is in Slave Serial mode, the PROM
and the FPGA must both be clocked by an incoming signal.
Multiple devices can be concatenated by using the CEO
output to drive the CE input of the following device. The
clock inputs and the DATA outputs of all PROMs in this
chain are interconnected. All devices are compatible and
can be cascaded with other members of the family.
For device programming, either the Xilinx Alliance or Foun-
dation series development system compiles the FPGA
design file into a standard Hex format, which is then trans-
ferred to most commercial PROM programmers.
0
XC1700E and XC1700L Series
Configuration PROMs
DS027 (v3.1) July 5, 2000
0
8
Product Specification
R
Figure 1: Simplified Block Diagram (does not show programming circuit)
EPROM
Cell
Matrix
Address Counter
CE
DATA
OE
Output
CLK
VCC
VPP
GND
DS027_01_021500
TC
OE
RESET/
OE/
RESET
or
CEO
XC1700E and XC1700L Series Configuration PROMs
2
1-800-255-7778
Product Specification
R
Pin Description
DATA
Data output is in a high-impedance state when either CE or
OE are inactive. During programming, the DATA pin is I/O.
Note that OE can be programmed to be either active High or
active Low.
CLK
Each rising edge on the CLK input increments the internal
address counter, if both CE and OE are active.
RESET/OE
When High, this input holds the address counter reset and
puts the DATA output in a high-impedance state. The polar-
ity of this input pin is programmable as either RESET/OE or
OE/RESET. To avoid confusion, this document describes
the pin as RESET/OE, although the opposite polarity is pos-
sible on all devices. When RESET is active, the address
counter is held at "0", and puts the DATA output in a
high-impedance state. The polarity of this input is program-
mable. The default is active High RESET, but the preferred
option is active Low RESET, because it can be driven by the
FPGAs INIT pin.
The polarity of this pin is controlled in the programmer inter-
face. This input pin is easily inverted using the Xilinx
HW-130 Programmer. Third-party programmers have differ-
ent methods to invert this pin.
CE
When High, this pin disables the internal address counter,
puts the DATA output in a high-impedance state, and forces
the device into low-I
CC
standby mode.
CEO
Chip Enable output, to be connected to the CE input of the
next PROM in the daisy chain. This output is Low when the
CE and OE inputs are both active AND the internal address
counter has been incremented beyond its Terminal Count
(TC) value. In other words: when the PROM has been read,
CEO will follow CE as long as OE is active. When OE goes
inactive, CEO stays High until the PROM is reset. Note that
OE can be programmed to be either active High or active
Low.
V
PP
Programming voltage. No overshoot above the specified
max voltage is permitted on this pin. For normal read oper-
ation, this pin must be connected to V
CC
. Failure to do so
may lead to unpredictable, temperature-dependent opera-
tion and severe problems in circuit debugging. Do not leave
V
PP
floating!
V
CC
and GND
Positive supply and ground pins.
PROM Pinouts
Capacity
Pin Name
8-pin
PDIP
SOIC
VOIC
20-pin
SOIC
20-pin
PLCC
44-pin
VQFP
44-pin
PLCC
DATA
1
1
2
40
2
CLK
2
3
4
43
5
RESET/OE
(OE/RESET)
3
8
6
13
19
CE
4
10
8
15
21
GND
5
11
10
18, 41
24, 3
CEO
6
13
14
21
27
V
PP
7
18
17
35
41
V
CC
8
20
20
38
44
Devices
Configuration Bits
XC1704L
4,194,304
XC1702L
2,097,152
XC1701/L
1,048,576
XC17512L
524,288
XC1736E
36,288
XC1765E/EL
65,536
XC17128E/EL
131,072
XC17256E/EL
262,144
XC1700E and XC1700L Series Configuration PROMs
DS027 (v3.1) July 5, 2000
3
Product Specification
1-800-255-7778
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Xilinx FPGAs and Compatible PROMs
Device
Configuration
Bits
PROM
XC4003E
53,984
XC17128E
(1)
XC4005E
95,008
XC17128E
XC4006E
119,840
XC17128E
XC4008E
147,552
XC17256E
XC4010E
178,144
XC17256E
XC4013E
247,968
XC17256E
XC4020E
329,312
XC1701
XC4025E
422,176
XC1701
XC4002XL
61,100
XC17128EL
(1)
XC4005XL
151,960
XC17256EL
XC4010XL
283,424
XC17512L
XC4013XL/XLA
393,632
XC17512L
XC4020XL/XLA
521,880
XC17512L
XC4028XL/XLA
668,184
XC1701L
XC4028EX
668,184
XC1701
XC4036EX/XL/XLA
832,528
XC1701L
XC4036EX
832,528
XC1701
XC4044XL/XLA
1,014,928
XC1701L
XC4052XL/XLA
1,215,368
XC1702L
XC4062XL/XLA
1,433,864
XC1702L
XC4085XL/XLA
1,924,992
XC1702L
XC40110XV
2,686,136
XC1704L
XC40150XV
3,373,448
XC1704L
XC40200XV
4,551,056
XC1704L +
XC17512L
XC40250XV
5,433,888
XC1704L+
XC1702L
XC5202
42,416
XC1765E
XC5204
70,704
XC17128E
XC5206
106,288
XC17128E
XC5210
165,488
XC17256E
XC5215
237,744
XC17256E
XCV50
559,232
XC1701L
XCV100
781,248
XC1701L
XCV150
1,041,128
XC1701L
XCV200
1,335,872
XC1702L
XCV300
1,751,840
XC1702L
XCV400
2,546,080
XC1704L
XCV600
3,608,000
XC1704L
XCV800
4,715,648
XC1704L +
XC1701L
XCV1000
6,127,776
XC1704L +
XC1702L
XCV50E
630,048
XC1701L
XCV100E
863,840
XC1701L
XCV200E
1,442,106
XC1702L
XCV300E
1,875,648
XC1702L
XCV400E
2,693,440
XC1704L
XCV405E
3,340,400
XC1704L
XCV600E
3,961,632
XC1704L
XCV812E
6,519,648
2 of XC1704L
XCV1000E
6,587,520
2 of XC1704L
XCV1600E
8,308,992
2 of XC1704L
XCV2000E
10,159,648
3 of XC1704L
XCV2600E
12,922,336
4 of XC1704L
XCV3200E
16,283,712
4 of XC1704L
Notes:
1.
The suggested PROM is determined by compatibility with the
higher configuration frequency of the Xilinx FPGA CCLK.
Designers using the default slow configuration frequency
(CCLK) can use the XC1765E or XC1765EL for the noted
FPGA devices.
Device
Configuration
Bits
PROM
XC1700E and XC1700L Series Configuration PROMs
4
DS027 (v3.1) July 5, 2000
1-800-255-7778
Product Specification
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Controlling PROMs
Connecting the FPGA device with the PROM.
•
The DATA output(s) of the of the PROM(s) drives the
D
IN
input of the lead FPGA device.
•
The Master FPGA CCLK output drives the CLK input(s)
of the PROM(s).
•
The CEO output of a PROM drives the CE input of the
next PROM in a daisy chain (if any).
•
The RESET/OE input of all PROMs is best driven by
the INIT output of the lead FPGA device. This
connection assures that the PROM address counter is
reset before the start of any (re)configuration, even
when a reconfiguration is initiated by a V
CC
glitch.
Other methods—such as driving RESET/OE from LDC
or system reset—assume the PROM internal
power-on-reset is always in step with the FPGA’s
internal power-on-reset. This may not be a safe
assumption.
•
The PROM CE input can be driven from either the LDC
or DONE pins. Using LDC avoids potential contention
on the D
IN
pin.
•
The CE input of the lead (or only) PROM is driven by
the DONE output of the lead FPGA device, provided
that DONE is not permanently grounded. Otherwise,
LDC can be used to drive CE, but must then be
unconditionally High during user operation. CE can
also be permanently tied Low, but this keeps the DATA
output active and causes an unnecessary supply
current of 10 mA maximum.
FPGA Master Serial Mode Summary
The I/O and logic functions of the Configurable Logic Block
(CLB) and their associated interconnections are established
by a configuration program. The program is loaded either
automatically upon power up, or on command, depending
on the state of the three FPGA mode pins. In Master Serial
mode, the FPGA automatically loads the configuration pro-
gram from an external memory. The Xilinx PROMs have
been designed for compatibility with the Master Serial
mode.
Upon power-up or reconfiguration, an FPGA enters the
Master Serial mode whenever all three of the FPGA
mode-select pins are Low (M0=0, M1=0, M2=0). Data is
read from the PROM sequentially on a single data line. Syn-
chronization is provided by the rising edge of the temporary
signal CCLK, which is generated during configuration.
Master Serial Mode provides a simple configuration inter-
face. Only a serial data line and two control lines are
required to configure an FPGA. Data from the PROM is
read sequentially, accessed via the internal address and bit
counters which are incremented on every valid rising edge
of CCLK.
If the user-programmable, dual-function D
IN
pin on the
FPGA is used only for configuration, it must still be held at a
defined level during normal operation. The Xilinx FPGA
families take care of this automatically with an on-chip
default pull-up resistor.
Programming the FPGA With Counters
Unchanged Upon Completion
When multiple FPGA-configurations for a single FPGA are
stored in a PROM, the OE pin should be tied Low. Upon
power-up, the internal address counters are reset and con-
figuration begins with the first program stored in memory.
Since the OE pin is held Low, the address counters are left
unchanged after configuration is complete. Therefore, to
reprogram the FPGA with another program, the DONE line
is pulled Low and configuration begins at the last value of
the address counters.
This method fails if a user applies RESET during the FPGA
configuration process. The FPGA aborts the configuration
and then restarts a new configuration, as intended, but the
PROM does not reset its address counter, since it never
saw a High level on its OE input. The new configuration,
therefore, reads the remaining data in the PROM and inter-
prets it as preamble, length count etc. Since the FPGA is
the master, it issues the necessary number of CCLK pulses,
up to 16 million (2
24
) and DONE goes High. However, the
FPGA configuration will be completely wrong, with potential
contentions inside the FPGA and on its output pins. This
method must, therefore, never be used when there is any
chance of external reset during configuration.
Cascading Configuration PROMs
For multiple FPGAs configured as a daisy-chain, or for
future FPGAs requiring larger configuration memories, cas-
caded PROMs provide additional memory. After the last bit
from the first PROM is read, the next clock signal to the
PROM asserts its CEO output Low and disables its DATA
line. The second PROM recognizes the Low level on its CE
input and enables its DATA output. See
.
After configuration is complete, the address counters of all
cascaded PROMs are reset if the FPGA RESET pin goes
Low, assuming the PROM reset polarity option has been
inverted.
To reprogram the FPGA with another program, the DONE
line goes Low and configuration begins where the address
counters had stopped. In this case, avoid contention
between DATA and the configured I/O use of D
IN
.
XC1700E and XC1700L Series Configuration PROMs
DS027 (v3.1) July 5, 2000
Product Specification
1-800-255-7778
R
Figure 2: Master Serial Mode. The one-time-programmable PROM supports automatic loading of configuration programs.
Multiple devices can be cascaded to support additional FPGAs. An early DONE inhibits the PROM data output one CCLK
cycle before the FPGA I/Os become active.
D
IN
D
OUT
CCLK
INIT
DONE
PROM
DATA
CLK
CE
CE
FPGA
(Low Resets the Address Pointer)
* For mode pin connections,
refer to the appropriate FPGA data sheet.
V
CC
V
CC
V
CC
OPTIONAL
Daisy-chained
FPGAs with
Different
configurations
OPTIONAL
Slave FPGAs
with Identical
Configurations
RESET
RESET
DS027_02_060100
CCLK
(Output)
D
IN
D
OUT
(Output)
OE/RESET
MODES*
V
PP
Cascaded
Serial
Memory
DATA
CLK
CEO
OE/RESET
3.3V
4.7K
XC1700E and XC1700L Series Configuration PROMs
6
DS027 (v3.1) July 5, 2000
1-800-255-7778
Product Specification
R
Standby Mode
The PROM enters a low-power standby mode whenever CE
is asserted High. The output remains in a high impedance
state regardless of the state of the OE input.
Programming
The devices can be programmed on programmers supplied
by Xilinx or qualified third-party vendors. The user must
ensure that the appropriate programming algorithm and the
latest version of the programmer software are used. The
wrong choice can permanently damage the device.
Table 1: Truth Table for XC1700 Control Inputs
Control Inputs
Internal Address
Outputs
RESET
CE
DATA
CEO
I
CC
Inactive
Low
If address < TC
(1)
: increment
If address > TC
(2)
: don’t change
Active
High-Z
High
Low
Active
Reduced
Active
Low
Held reset
High-Z
High
Active
Inactive
High
Not changing
High-Z
High
Standby
Active
High
Held reset
High-Z
High
Standby
Notes:
1.
The XC1700 RESET input has programmable polarity
2.
TC = Terminal Count = highest address value. TC + 1 = address 0.
XC1700E and XC1700L Series Configuration PROMs
DS027 (v3.1) July 5, 2000
Product Specification
1-800-255-7778
R
XC1701, XC1736E, XC1765E, XC17128E and XC17256E
Absolute Maximum Ratings
Operating Conditions (5V Supply)
DC Characteristics Over Operating Condition
Symbol
Description
Conditions
Units
V
CC
Supply voltage relative to GND
–0.5 to +7.0
V
V
PP
Supply voltage relative to GND
–0.5 to +12.5
V
V
IN
Input voltage relative to GND
–0.5 to V
CC
+0.5
V
V
TS
Voltage applied to High-Z output
–0.5 to V
CC
+0.5
V
T
STG
Storage temperature (ambient)
–65 to +150
°
C
T
SOL
Maximum soldering temperature (10s @ 1/16 in.)
+260
°
C
Notes:
1.
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
listed under Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
Symbol
Description
Min
Max
Units
V
CC
(1)
Supply voltage relative to GND (T
A
= 0
°
C to +70
°
C)
Commercial
4.750
5.25
V
Supply voltage relative to GND (T
A
= –40
°
C to +85
°
C)
Industrial
4.50
5.50
V
Notes:
1.
During normal read operation V
PP
MUST
be connect to V
CC.
Symbol
Description
Min
Max
Units
V
IH
High-level input voltage
2
V
CC
V
V
IL
Low-level input voltage
0
0.8
V
V
OH
High-level output voltage (I
OH
= –4 mA)
Commercial
3.86
-
V
V
OL
Low-level output voltage (I
OL
= +4 mA)
-
0.32
V
V
OH
High-level output voltage (I
OH
= –4 mA)
Industrial
3.76
-
V
V
OL
Low-level output voltage (I
OL
= +4 mA)
-
0.37
V
I
CCA
Supply current, active mode (at maximum frequency)
-
10
mA
I
CCS
Supply current, standby mode
-
50
m
A
I
CCS
Supply current, standby mode (XC1701)
-
100
m
A
I
L
Input or output leakage current
–10
10
m
A
C
IN
Input capacitance (V
IN
= GND, f = 1.0 MHz)
-
10
pF
C
OUT
Output capacitance (V
IN
= GND, f = 1.0 MHz)
-
10
pF
XC1700E and XC1700L Series Configuration PROMs
8
DS027 (v3.1) July 5, 2000
1-800-255-7778
Product Specification
R
XC1704L, XC1702L, XC1701L, XC17512L, XC1765EL, XC17128EL and XC17256EL
Absolute Maximum Ratings
Operating Conditions (3V Supply)
DC Characteristics Over Operating Condition
Symbol
Description
Conditions
Units
V
CC
Supply voltage relative to GND
–0.5 to +7.0
V
V
PP
Supply voltage relative to GND
–0.5 to +12.5
V
V
IN
Input voltage relative to GND
–0.5 to V
CC
+0.5
V
V
TS
Voltage applied to High-Z output
–0.5 to V
CC
+0.5
V
T
STG
Storage temperature (ambient)
–65 to +150
°
C
T
SOL
Maximum soldering temperature (10s @ 1/16 in.)
+260
°
C
Notes:
1.
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
listed under Operating Conditions is not implied. Exposure to Absolute Maximum Ratings conditions for extended
periods of time may affect device reliability.
Symbol
Description
Min
Max
Units
V
CC
(1)
Supply voltage relative to GND (T
A
= 0
°
C to +70
°
C)
Commercial
3.0
3.6
V
Supply voltage relative to GND (T
A
= –40
°
C to +85
°
C)
Industrial
3.0
3.6
V
Notes:
1.
During normal read operation V
PP
MUST
be connect to V
CC.
Symbol
Description
Min
Max
Units
V
IH
High-level input voltage
2
V
CC
V
V
IL
Low-level input voltage
0
0.8
V
V
OH
High-level output voltage (I
OH
= –3 mA)
2.4
-
V
V
OL
Low-level output voltage (I
OL
= +3 mA)
-
0.4
V
I
CCA
Supply current, active mode (at maximum frequency) (XC1700L)
-
10
mA
I
CCA
Supply current, active mode (at maximum frequency)
(XC1765EL, XC17128EL, XC17256EL)
-
5
mA
I
CCS
Supply current, standby mode (XC1701L, XC17512L, XC17256L,
X1765EL, XC17128EL)
-
50
m
A
I
CCS
Supply current, standby mode (XC1702L, XC1704L)
-
350
m
A
I
L
Input or output leakage current
–10
10
m
A
C
IN
Input capacitance (V
IN
= GND, f = 1.0 MHz)
-
10
pF
C
OUT
Output capacitance (V
IN
= GND, f = 1.0 MHz)
-
10
pF
XC1700E and XC1700L Series Configuration PROMs
DS027 (v3.1) July 5, 2000
Product Specification
1-800-255-7778
R
AC Characteristics Over Operating Condition
Symbol
Description
XC1701,
XC17128E,
XC17256E
XC17128EL,
XC17256EL,
XC1704L,
XC1702L,
XC1701L,
XC17512L
XC1736E,
XC1765E
XC1765EL
Units
Min
Max
Min
Max
Min
Max
Min
Max
T
OE
OE to data delay
-
25
-
30
-
45
-
40
ns
T
CE
CE to data delay
-
45
-
45
-
60
-
60
ns
T
CAC
CLK to data delay
-
45
-
45
-
80
-
200
ns
T
DF
CE or OE to data float delay
(2,3)
-
50
-
50
-
50
-
50
ns
T
OH
Data hold from CE, OE, or CLK
(3)
0
-
0
-
0
-
0
-
ns
T
CYC
Clock periods
67
-
67
-