HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 505
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HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6432160.pdf
(829 pages)
- Current page: 505 of 829
- Download datasheet (5Mb)
This LSI has three on-chip keyboard buffer controller channels. The keyboard buffer controller is
provided with functions conforming to the PS/2 interface specifications.
Data transfer using the keyboard buffer controller employs a data line (KD) and a clock line
(KCLK), providing economical use of connectors, board surface area, etc. Figure 17.1 shows a
block diagram of the keyboard buffer controller.
17.1
IFKEY10A_000020020700
Conforms to PS/2 interface specifications
Direct bus drive (via the KCLK and KD pins)
Interrupt sources: on completion of data reception and on detection of clock edge
Error detection: parity error and stop bit monitoring
KD
(PS2AD,
PS2BD,
PS2CD)
KCLK
(PS2AC,
PS2BC,
PS2CC)
Legend
KD:
KCLK:
KBBR:
KBCRH: Keyboard control register H
KBCRL: Keyboard control register L
Features
KBC data I/O pin
KBC clock I/O pin
Keyboard data buffer register
Section 17 Keyboard Buffer Controller
Figure 17.1 Block Diagram of Keyboard Buffer Controller
Control
logic
KDI
KCLKI
Parity
KDO
KCLKO
Register counter value
KBI interrupt
KBCRH
KBCRL
KBBR
Rev. 2.0, 08/02, page 465 of 788
Internal
data bus
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