AMD
TAXI Technical Information Publication #89-12
S u b je c t : TAXlc h ip P in s In t e rn a l Circ u it
Qu e s t io n :
What do the TAXIchip I/O circuits look like?
An s w e r:
There are five different input circuits and two different output circuits in the TAXIchip set.
Each I/O circuit has Electro Static Discharge (ESD) protection circuit attached to it.
The five input types are: TTL Input, ECL Input, Three State Input (TSI), High Threshold
Input (HTI), and Oscillator (OSC).
The two output types are: TTL Output and ECL Output.
Each I/O circuit and the ESD circuit are shown on the following page. The following
table lists all Transmitter and Receiver pins and their I/O type.
Transmitter
Receiver
Pin
1
2
3
4
Pin Name
ACK
STRB
SEROUT+
SEROUT–
I/O Type
TTL OUT
TTL IN
ECL OUT
ECL OUT
Pin
1
2
3
4
Pin Name
I/O Type
TTL OUT
TTL OUT
TTL OUT
TTL OUT
DO3
DO2
DO1
DO0
5
6
7
VCC2
VCC1
VCC3
5 V
5 V
5 V
5
6
7
IGM
TTL OUT
HTI
RESET
VCC1
5 V
8
9
RESET
DMS
CLS
SERIN
CI0
HTI
TSI
TSI
8
9
VCC2
5 V
SERIN+
SERIN–
DMS
DSTRB
CSTRB
VLTN
CO0
ECL IN
ECL IN
TSI
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
ECL IN
TTL IN
TTL IN
TTL IN
TTL IN
TTL IN
TTL IN
TTL OUT
OSC
OSC
GND
GND
TTL IN
TTL IN
TTL IN
TTL IN
TTL IN
TTL IN
TTL OUT
TTL OUT
TTL OUT
TTL OUT
TTL OUT
TTL OUT
TTL OUT
TTL OUT
GND
GND
OSC
OSC
TTL IN
CI1
DI9/CI2
DI8/CI3
DI7
DI6
CLK
X2
CO1
DO9/CO2
DO8/CO3
CLK
GND1
GND2
X1
X2
CNB
DO7
DO6
X1
GND2
GND1
DI0
DI1
DI2
DI3
DI4
DI5
TTL OUT
TTL OUT
TTL OUT
TTL OUT
DO5
DO4
TAXIchip Integrated Circuits Technical Manual
107
AMD [ AMD ]
