M-S Cash Drawer 7193 - Manual (Page 56)

Communication 7193 Owner’s Guide
May 1996 52
Parallel Interface
Parallel Protocol
The 7193 uses a standard PC-compatible parallel interface. The following
illustration shows the timing diagram for the interface protocol.
1. ACK/ will not go high until STROBE/ goes high.
2. When the printer is not ready to receive more data, ACK/ will be sent, but
BUSY will remain high.
3. When the power is turned on or the printer is reset, an ACK/ will be sent
during initialization.
4. Typical time from STROBE/ to ACK/ is approximately 44 µ seconds.