h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 588

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 17 Keyboard Buffer Controller
17.1.2
Figure 17.2 shows a block diagram of the keyboard buffer controller.
Rev. 3.00 Jan 18, 2006 page 560 of 1044
REJ09B0280-0300
KD
(PS2AD,
PS2BD,
PS2CD)
KCLK
(PS2AC,
PS2BC,
PS2CC)
Legend:
KD:
KCLK:
KBBR:
KBCRH: Keyboard control register H
KBCRL: Keyboard control register L
Block Diagram
KBC data I/O pin
KBC clock I/O pin
Keyboard data buffer register
Control
Figure 17.2 Block Diagram of Keyboard Buffer Controller
logic
KDI
KCLKI
Parity
KDO
KCLKO
Register counter value
KB interrupt
KBCRH
KBCRL
KBBR
Internal
data bus