Register Description; Control Register (Cr); Table 16.1 Pin Function Of Keyboard Controller Interface Module - Hitachi HD64465 User Manual

Table 16.1 Pin Function of Keyboard Controller Interface Module

Name I/O
KBCS# O
XIOW# O
XIOR# O
KBIRQ0 I
KBIRQ1 I
KBRESUME# I
KBWAKEUP# O
16.2

Register Description

Register or Buffer
CR
SR
H8C1R
H8C2R
16.2.1

Control Register (CR)

CR, a 16-bit read/write register, is used to control keyboard controller interface. All bits in this
register are initialized to 0 at reset. CR is not initialized in STANDBY mode.
Bit 7
Bit Name reserved reserved
Initial Value -
R/W -
Bit Description
7 - 6 Reserved
5 KCRESUME Trigger Type Select 1 (KCRTTS1):
1: If edge trigger is selected, falling edge trigger is selected.
If level trigger is selected, low level trigger is selected.
0: If edge trigger is selected, rising edge trigger is selected.
If level trigger is selected, high level trigger is selected.
Pin Function
Keyboard Controller Chip Select
Keyboard Controller Write Enable
Keyboard Controller Read Enable
Keyboard Controller interrupt 0
Keyboard Controller interrupt 1
Keyboard Controller Resume
Keyboard Controller wakes up the STANDBY system via signal
KBWAKEUP#.
Function
Control Register
Status Register
H8 Control 1 Register
H8 Control 2 Register
6 5
KCRTTS1 KCRTTS0 IRQ1TTS1 IRQ1TTS0 IRQ0TTS1 IRQ0TTS0
- 0
- R/W
Access Size
8 bits
8 bits
8 bits
8 bits
4 3 2
0 0 0
R/W R/W R/W
Rev. 3.0, 03/01, page 245 of 390
Address
H'1000D800
H'1000D802
H'1000D000
H'1000D004
1 0
0 0
R/W R/W
Default
-
0