XQ18V04 Datasheet, PDF (3/17 Pages) Xilinx, Inc – QPro XQ18V04 (XQR18V04) QML In-System Programmable Configuration PROMs

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QPro XQ18V04 (XQR18V04) QML In-System Programmable Configuration PROMs
Table 1: Pin Names and Descriptions (pins not listed are “no connect”) (Continued)
Pin
Name
Boundary
Scan
Order
Function
Pin Description
44-pin 44-pin
VQFP CLCC
CF
22
21
DATA OUT Allows JTAG CONFIG instruction to initiate FPGA
10
16
OUTPUT
ENABLE
configuration without powering down FPGA. This is an
open-drain output that is pulsed Low by the JTAG CONFIG
command.
CEO
13
14
DATA OUT Chip Enable Output (CEO) is connected to the CE input of 21
27
OUTPUT
ENABLE
the next PROM in the chain. This output is Low when CE is
Low and OE/RESET input is High, AND the internal
address counter has been incremented beyond its
Terminal Count (TC) value. When OE/RESET goes Low,
CEO stays High until the PROM is brought out of reset by
bringing OE/RESET High.
GND
GND is the ground connection.
6, 18,
28 &
41
3, 12,
24 &
34
TMS
MODE SELECT The state of TMS on the rising edge of TCK determines the
5
11
state transitions at the Test Access Port (TAP) controller.
TMS has an internal 50K ohm resistive pull-up on it to
provide a logic "1" to the device if the pin is not driven.
TCK
CLOCK
This pin is the JTAG test clock. It sequences the TAP
controller and all the JTAG test and programming
electronics.
7
13
TDI
DATA IN
This pin is the serial input to all JTAG instruction and data
3
9
registers. TDI has an internal 50K ohm resistive pull-up on
it to provide a logic "1" to the system if the pin is not driven.
TDO
DATA OUT This pin is the serial output for all JTAG instruction and data 31
37
registers. TDO has an internal 50K ohm resistive pull-up on
it to provide a logic "1" to the system if the pin is not driven.
V_CC
Positive 3.3V supply voltage for internal logic and input
17, 35 23, 41
buffers.
& 38 & 44
V_CCO
Positive 3.3V or 2.5V supply voltage connected to the
output voltage drivers.
8, 16,
26 &
36
14, 22,
32 &
42
DS082 (v1.2) November 5, 2001
www.xilinx.com
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Preliminary Product Specification
1-800-255-7778