H8S2114R Datasheet, PDF (631/1038 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2100 Series

Figure 17.2 shows how the KBU is connected.
Section 17 Keyboard Buffer Control Unit (KBU)
Vcc Vcc
System side
KCLK in
KCLK out
Clock
Keyboard side
KCLK in
KCLK out
KD in
KD out
Data
Keyboard buffer control unit
(This LSI)
Figure 17.2 KBU Connection
KD in
KD out
I/F
Rev. 3.00 Jul. 14, 2005 Page 583 of 986
REJ09B0098-0300