XC1701 Datasheet, PDF (5/10 Pages) Xilinx, Inc – On-chip address counter, incremented by each rising

Standby Mode
The PROM enters a low-power standby mode whenever
CE is asserted High. The output remains in a high imped-
ance 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
RESET
Inactive
CE
Low
Active
Inactive
Active
Low
High
High
Internal Address
if address < TC: increment
if address > TC: don’t change
Held reset
Not changing
Held reset
DATA
active
3-state
3-state
3-state
3-state
Notes: 1. The XC1700 RESET input has programmable polarity
2. TC = Terminal Count = highest address value. TC+1 = address 0.
Outputs
CEO
High
Low
High
High
High
I_cc
active
reduced
active
standby
standby
IMPORTANT: Always tie the V_PP pin to V_CC in your application. Never leave V_PP floating.
December 10, 1997 (Version 1.1)
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