am79c981 Advanced Micro Devices, am79c981 Datasheet - Page 21

• Manufacturer Part Number: am79c981
• Description: Integrated Multiport Repeater Plus? Imr+? ??9
• Manufacturer: Advanced Micro Devices

(Note 3)
Notes:
1. Externally generated signal illustrates internal IMR+ chip clock phase relationship.
2. IMR+ chip standalone, X will be low. When attached to a HIMIB device, X reflects the state of the CI pair.
3. STR signal is not available when the IMR+ chip is attached to HIMIB device, and must be generated externally.
(Note 1)
CRS
RST
TCK
STR
X1
ASYNC
RESET
CK
D
1/2 ’74
XTAL
OSC
1
Figure 5b. Port Activity Monitor Implementation (Continued)
Q
2
Figure 5a. Port Activity Monitor Implementation
9
10
X1
X2
RST
AUI
11
Am79C981
IMR+ Chip
CK
D
PRELIMINARY
1/2 ’74
CLR
Am79C981
TP0
Q
Q
CRS
STR
TP1
TCK
TCK
Carrier Sense Outputs
CK
SI
CK
T
P
7
T
P
6
Shift Register
P
T
5
TP7
Register
SIPO
(Note 2)
T
P
0
17306B-9
X
U
A
I
AUI
AMD
17306B-10
TP0
1–91