7
DATA CR(IN)
：
When input is set to LOW level at talker, CR code(ASCII) is sent out.
DATA LF(IN)
：
When input is set to LOW level at talker, LF code(ASCII) is sent out.
DATA END(IN)
：
When input becomes the HIGH level from the LOW level, talker
operation is stop. It connects the gate signal of the last byte and EOI
is output.
STB1 to STB8(IN)
：
It inputs the status data (negative logic) to the controller when
SRQ occurs.
*1: Set”1” when SRQ occurs and become “0” after serial polling.
REQUEST(IN)
：
At the rising of this signal, SRQ is generated.
SRQ
：
ZS-6123BP generates SRQ when REQUEST signal becomes LOW level from
HIGH level. The controller performs serial polling and checks the status byte.
After serial polling is completed, SRQ is reset.
TLK(OUT)
：
It becomes LOW level when it is a talker.
LSN(OUT)
：
It becomes LOW level when it is a listener.
BUSY(OUT)
：
It becomes the LOW level at the falling of TLK output signal and return to the
HIGH level at the falling of DATA END input signal. The BUSY signal is a
signal indicating that is being sent and is used for data hold signal of the
output device.
GP-IBデータ
TLK
DATA END
BUSY
GP-IB DATA
