M16C6K9 Datasheet, PDF (209/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
PS2 Interface
PS2 Interface
PS2 interface is supported by 3 channels of serial transmission/reception circuit which is based on PS2
standard specifications.
There are two signal lines, used by PS2 interface : PS2 data(DAT) and PS2 clock(CLK).
The DAT and CLK signal lines are bidirection and should be connected to positive power supply via external
pull-up resistors. These two pins are N-channel open drain output. While bus is released, the states of DAT
and CLK is “High”. Fig.GK-1 shows the system configuration.
Output
DAT
Input
Output
CLK
Input
Control side
Fig.GK-1 System configuration
Output
DAT
Input
Output
CLK
Input
Device side
Rev.1.00 Jun 06, 2003 page 209 of 290