R
Platform Flash In-System Programmable Configuration PROMs
Pinouts and Pin Descriptions
The XCFxxS Platform Flash PROM is available in the VO20 and VOG20 packages. The XCFxxP Platform Flash PROM is
available in the VO48, VOG48, FS48, and FSG48 packages. For package drawings, specifications, and additional
information, see
Device Package User Guide,
or the
Notes:
1.
2.
3.
VO20/VOG20 denotes a 20-pin (TSSOP) Plastic Thin Shrink Small Outline Package.
VO48/VOG48 denotes a 48-pin (TSOP) Plastic Thin Small Outline Package.
FS48/FSG48 denotes a 48-pin (TFBGA) Plastic Thin Fine Pitch Ball Grid Array (0.8 mm pitch).
XCFxxS Pinouts and Pin Descriptions
XCFxxS VO20/VOG20 Pin Names and Descriptions
provides a list of the pin names and descriptions for the XCFxxS 20-pin VO20/VOG20 package.
Table 13:
XCFxxS Pin Names and Descriptions
Pin Name
D0
Boundary
Scan Order
4
3
0
20
Boundary Scan
Function
Data Out
Output Enable
Data In
Data In
Data Out
Output Enable
Data In
Data Out
Output Enable
Data Out
Output Enable
Pin Description
D0 is the DATA output pin to provide data for configuring an
FPGA in serial mode. The D0 output is set to a
high-impedance state during ISPEN (when not clamped).
Configuration Clock Input. Each rising edge on the CLK input
increments the internal address counter if the CLK input is
selected, CE is Low, and OE/RESET is High.
Output Enable/Reset (Open-Drain I/O). When Low, this input
holds the address counter reset and the DATA output is in a
high-impedance state. This is a bidirectional open-drain pin
that is held Low while the PROM completes the internal
power-on reset sequence. Polarity is not programmable.
Chip Enable Input. When CE is High, the device is put into
low-power standby mode, the address counter is reset, and
the DATA pins are put in a high-impedance state.
Configuration Pulse (Open-Drain Output). Allows JTAG
CONFIG instruction to initiate FPGA configuration without
powering down FPGA. This is an open-drain output that is
pulsed Low by the JTAG CONFIG command.
Chip Enable Output. Chip Enable Output (CEO) is connected
to the CE input of 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. CEO returns to High when
OE/RESET goes Low or CE goes High.
JTAG Mode Select Input. The state of TMS on the rising edge
of TCK determines the state transitions at the Test Access
Port (TAP) controller. TMS has an internal 50 KΩ resistive
pull-up to V
CCJ
to provide a logic 1 to the device if the pin is
not driven.
JTAG Clock Input. This pin is the JTAG test clock. It
sequences the TAP controller and all the JTAG test and
programming electronics.
JTAG Serial Data Input. This pin is the serial input to all JTAG
instruction and data registers. TDI has an internal 50 KΩ
resistive pull-up to V
CCJ
to provide a logic 1 to the device if the
pin is not driven.
JTAG Serial Data Output. This pin is the serial output for all
JTAG instruction and data registers. TDO has an internal
50 KΩ resistive pull-up to V
CCJ
to provide a logic 1 to the
system if the pin is not driven.
+3.3V Supply. Positive 3.3V supply voltage for internal logic.
20-pin TSSOP
(VO20/VOG20)
1
CLK
3
OE/RESET
19
18
8
CE
15
22
10
CF
21
12
7
CEO
11
13
TMS
–
Mode Select
5
TCK
–
Clock
6
TDI
–
Data In
4
TDO
VCCINT
–
–
Data Out
–
17
18
DS123 (v2.11.1) March 30, 2007
Product Specification
37
XILINX [ XILINX, INC ]
