M16C6K9 Datasheet, PDF (220/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
PS2 Interface
(2) Operation description
q Basic setting
The following items should be set for PS2 mode register (address 02AC16) set when PS2 interface is used.
• PS2 interface enable bit
Set the PS2 interface enable bits (bit4 to 6 of PS2 mode register) to “1” to enable the PS2 channels to be
used. At this time PS2 clock goes “Low” (Receiving disable).
• Sampling clock selection bit
Sampling clock cycle (1/4,1/8,1/16,1/32 of main clock) is selected by setting sampling clock bit (bits 0,1).
• External interrupt function support pin (PS2B) selection
This bit is used to select PS2 clock (CLK) or PS2 data (DAT) for the external interrupt function support pin
(PS2B).
Rev.1.00 Jun 06, 2003 page 220 of 290