Oki B6100 Technical Manual page 443

The Printer Controller connects to the PWBA HKB26 MCU directly. The Control Panel is connected the
Printer Controller and signals of it pass through the MCU via the Printer Controller. Table H-1 shows the
signals that are used by the MCU and the Controller.
SIGNAL
/CCLK
/VDO
/CPRDY
/CBSY
/STA
/TOP
/PPRDY
/PRFD
OKI B6100 Laser Printer - Base Engine Technical Manual
Version 1.0
DIRECTION
MCU<Controller Controller Clock: Synchronizing clock used for transmis-
sion of command and status.
MCU<Controller Video: Video data signal for maintaining synchronization
using /TOP and /BD. The transmission rate of 600dpi video
data is 17.62726Mpixel/sec and 1200dpi is 70.50902
Mpixel/sec.
MCU<Controller Controller Power Ready: Goes Low when the Controller is
powered up and the CPU completes initialization. When
High, the printer turns itself into the "Power-on" condition,
such as those of following:
• ROS Condition
The "ROS PAUSE" is selected.
• Exit tray Selection
The "STANDARD STACKER" is selected.
• Misprint Mode
The "MISPRINT" is released.
• Mismatch Detection
The "MISMATCH DISABLE" is selected.
• Fuser Condition
The "RESET FUSER PAUSE" is selected.
MCU<Controller Command Busy: The Controller holds this signal Low
when sending a command at the condition that /SBSY is
Low or /PPRDY is High.
MCU>Controller Status: The MCU sends a status (8 bits), synchronizing with
/CCLK sent by the Controller when the MCU holds /SBSY
Low.
MCU>Controller Top of Paper: Vertical synchronizing signal.
MCU>Controller Printer Power Ready: Goes Low when the printer is
powered on and the MCU CPU completes initialization The
printer is now in ON-LINE mode.
MCU<Controller Prefeed: When Controller sends this signal, the printer
feeds a sheet of paper to a spot that is just before the
registration position, and waits for /START. This signal
effective only when /RDY is Low.
Principles of Operation
FUNCTION
13-45