R
Platform Flash In-System Programmable Configuration PROMS
Table 11: XCFxxS Pin Names and Descriptions (Continued)
Boundary Boundary
Pin Name Scan Order Scan Function
20-pin TSSOP
(VO20/VOG20)
Pin Description
JTAG Serial Data Input. This pin is the serial input to all JTAG
instruction and data registers. TDI has an internal 50KΩ
resistive pull-up to VCCJ to provide a logic "1" to the device if
the pin is not driven.
TDI
Data In
4
JTAG Serial Data Output. This pin is the serial output for all
JTAG instruction and data registers. TDO has an internal
50KΩ resistive pull-up to VCCJ to provide a logic "1" to the
system if the pin is not driven.
TDO
Data Out
17
VCCINT
VCCO
+3.3V Supply. Positive 3.3V supply voltage for internal logic.
18
19
+3.3V, 2.5V, or 1.8V I/O Supply. Positive 3.3V, 2.5V, or 1.8V
supply voltage connected to the output voltage drivers and
input buffers.
+3.3V, 2.5V, or 1.8V JTAG I/O Supply. Positive 3.3V, 2.5V, or
1.8V supply voltage connected to the TDO output voltage
driver and TCK, TMS, and TDI input buffers.
VCCJ
20
GND
DNC
Ground
11
Do not connect. (These pins must be left unconnected.)
2, 9, 12, 14, 15, 16
XCFxxS Pinout Diagram
1
2
3
4
5
6
7
8
9
10
20
19
18
17
D0
(DNC)
CLK
VCCJ
VCCO
VCCINT
TDO
TDI
VO20/VOG20
Top View
16
15
14
13
12
11
TMS
(DNC)
(DNC)
(DNC)
CEO
TCK
CF
OE/RESET
(DNC)
CE
(DNC)
GND
ds123_02_071304
Figure 17: VO20/VOG20 Pinout Diagram (Top View)
with Pin Names
DS123 (v2.4) July 20, 2004
Preliminary Product Specification
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