Seiko Group BP-9000 owner manual Communication buffer size, Busy/ACK timing parallel interface

5. Extended setup options (71-74)

Communication buffer size

This function selects the maximum size of the input buffer.

When the selection of this function is completed, the printer is initialized.

The buffer size affects the signal protocol in serial data communication. In these protocols the printer's busy/ready state changes according to the data remaining values in the input buffer

described below.

71 BUFFER SIZE

B.SIZE: 64 KB

B.SIZE: 8 KB

B.SIZE: 128 B

BUFFER	Ready to Busy	Busy to Ready
SIZE	(CIN)	(CRN)
64k byte	1k byte	3k byte
8k byte
128 byte	32 byte	64 byte

Note: When the remaining data capacity of the input buffer is smaller than CIN, the printer becomes busy. This state continues until the remaining capacity of the buffer is larger than CRN.

Busy/ACK timing (parallel interface)

This function selects timing to activate the ACK signal for 8µ seconds (type 1) before, 4µ seconds (type 2) before, or simultaneously synchronized (type 3) with the busy signal going low.

72 BUSY/ACK

TIMING: TYPE 1

TIMING: TYPE 2

TIMING: TIPE 3

Type		Timing
TYPE 1	BUSY	8 ∝ s
	ACK
TYPE 2	BUSY
	ACK
TYPE 3	BUSY
	ACK

Data latch timing (parallel interface)

This function selects timing to latch the data signals at the rising edge (type R) or falling edge

(type F) of the STROBE signal. Type Timing

73 DATA LATCH
		STROBE
		TYPE F
		DATA 1~8
LTCH:	TYPE F.
LTCH:	TYPE R.
		STROBE
		TYPE R
		DATA 1~8

Setting of whether ERROR/PE signals are output or not

Setting is made whether or not ERROR and PE signals for the parallel interface are output.

When "NO" is selected,

ERROR signal remains HIGH, and PE signal remains LOW, even if Error status.

74 ERROR STATUS

STATUS SIG.:YES

STATUS SIG.:NO

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