Star Micronics TSP200 technical manual Cpu

PRINCIPLES OF OPERATION

2-1-2. Parallel interface

CN4

DATA 1

DATA 2

DARA 3

DATA 4

DATA 5

DARA 6

DATA 7

DATA 8

STROBE

IC5

BUSY

ACK

ERROR

SELECT

PAPER OUT

LS05

IC4

CD0

CD1

CD2

CD3

CD4

CD5

CD6

CD7

CSTB

BUSY

ACK

ERROR

SELECT

POUT

Gate array

IC1

CPU

Fig. 2-3 Parallel interface

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.

– 14 –