AM7968 AMD [Advanced Micro Devices], AM7968 Datasheet - Page 83

• Manufacturer Part Number: AM7968
• Description: TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface)
• Manufacturer: AMD [Advanced Micro Devices]

TAXI
TAXI
#1
#2
CNB TAXI #1 = 1
Figure 7-4
IGM TAXI #1 =
* Internal Signals
CNB TAXI #2
CSTRB OUT
DSTRB OUT
CSTRB OUT
DSTRB OUT
DATA OUT
DATA OUT
Serial Data
NRZ Data*
Command
Command
CLK OUT
Internal
SERIN
Clock*
OUT
OUT
Receiver Timing—8-Bit Cascade Mode
If CNB is HIGH, the Receiver will catch the next valid byte of data and hold it. It will not
attempt to catch any more data until it sees a Sync command from the Transmitter or
until its CNB goes LOW and then HIGH again.
If CNB is held LOW, the Receiver will not attempt to capture any data.
When the Primary Receiver RX1 catches a valid data byte it will raise its IGM (I Got
Mine) so the next Receiver RX2 can catch the next byte and so on down the line. After
all the receivers in the system have received their bytes a Sync must be sent or the next
byte of data will be lost
Referring to Figure 7-5 for a system of Cascaded Receivers.
(3)
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
DATA N
DATA N
In the Auto-Repeat Configuration, a Sync is not required.
1
1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1
1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1
TAXIchip Integrated Circuits Technical Manual
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
SYNC
SYNC
2
(3)
.
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
SYNC
SYNC
3
DATA 1
DATA 1
NO CHANGE
NO CHANGE
DATA N–1
DATA N
4
DATA 2
DATA 2
NO CHANGE
NO CHANGE
NO CHANGE
COMMAND 0
5
1 1 0 0 0 1 0 0 0 1
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
1 1 0 0 0 1 0 0 0 1
SYNC
SYNC
6
12330E-26
AMD
79