Parallel Interface - Star Micronics TSP200 Series Technical Manual

PRINCIPLES OF OPERATION

2-1-2. Parallel interface

DATA 1
DATA 2
DARA 3
DATA 4
DATA 5
DARA 6
DATA 7
DATA 8
STROBE
BUSY
ACK
ERROR
SELECT
PAPER OUT
When the printer is ready (BUSY is LOW), the host computer transmits eight bits of parallel data (DATA1,...,DATA8)
to CN4. The data passes through the gate array and moves into the CPU.
Printer signals from the CPU (ACK, ERROR, SELECT, PAPER OUT, etc.) pass through the gate array and are output
over the appropriate connector pins.
CN4
IC5
LS05
Fig. 2-3 Parallel interface
IC4
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
CSTB
BUSY
ACK
ERROR
SELECT
POUT
Gate array
– 14 –
IC1
CPU