
R
XC3000 Series Field Programmable Gate Arrays
7-34
November 9, 1998 (Version 3.1)
General XC3000 Series Switching Characteristics
Notes:
1. At power-up, VCC must rise from 2.0 V to VCC min in less than 25 ms. If this is not possible, configuration can be delayed by
holding RESET Low until Vcc has reached 4.0 V (2.5 V for XC3000L). A very long Vcc rise time of >100 ms, or a
non-monotonically rising VCC may require a >1-s High level on RESET, followed by a >6-s Low level on RESET and D/P
after Vcc has reached 4.0 V (2.5 V for XC3000L).
2. RESET timing relative to valid mode lines (M0, M1, M2) is relevant when RESET is used to delay configuration. The
specified hold time is caused by a shift-register filter slowing down the response to RESET during configuration.
3. PWRDWN transitions must occur while VCC >4.0 V(2.5 V for XC3000L).
4 TMRW
2 TMR
3 TRM
5 TPGW
6 TPGI
Clear State
Configuration State
User State
Note 3
VCCPD
X5387
RESET
M0/M1/M2
DONE/PROG
INIT
(Output)
PWRDWN
VCC (Valid)
Description
Symbol
Min
Max
Units
RESET (2)
M0, M1, M2 setup time required
M0, M1, M2 hold time required
RESET Width (Low) req. for Abort
2
3
4
TMR
TRM
TMRW
1
4.5
6
s
DONE/PROG
Width (Low) required for Re-config.
INIT response after D/P is pulled Low
5
6
TPGW
TPGI
6
7
s
PWRDWN (3)
Power Down VCC
VCCPD
2.3
V
Product Obsolete or Under Obsolescence