Xilinx XC4000 Series User Manual

September 18, 1996 (Version 1.04) 4-51
D
EC
Q
M
M
Q
L
rd

M
DELAY
M M
M M
Input Clock IK
I - capture
I - update
GLOBAL
S/R
FLIP-FLOP/LATCH
INVERT
S/R
Input Data 1 I1
Input Data 2 I2
X5792
PAD
V
CC
SLEW
RATE
PULL
UP
M
OUT
SEL
D
EC
Q
rd

M
M
M
INVERT
OUTPUT
M
M
INVERT
S/R
Ouput Clock OK
Clock Enable
Ouput Data O
O - update
Q - capture
O - capture
Boundary
Scan
M
EXTEST
TS - update
TS - capture
3-State TS
sd

sd

TS INV
OUTPUT
TS/OE
PULL
DOWN
INPUT
Boundary
Scan
Boundary
Scan
Figure 42: Block Diagram of XC4000E IOB with Boundary Scan (some details not shown).
XC4000EX Boundary Scan Logic is Identical.

Xilinx XC4000 Series Specifications

General

Brand	Xilinx
Model	XC4000 Series
Category	Controller
Language	English