參數(shù)資料
型號(hào)： W83977CTF-AW
英文描述： PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述： 周邊（多功能）控制器
文件頁數(shù)： 117/161頁
文件大小： 592K
代理商： W83977CTF-AW
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-108 -
Revision A1
10.6 Logical Device 5 (KBC)
CR30 (Default 0x01 if PENKBC= 1 during POR, default 0x00 otherwise)
Bit 7 - 1: Reserved.
Bit 0:
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x00, 0x60 if PENKBC= 1 during POR, default 0x00 otherwise)
These two registers select the first KBC I/O base address [0x100:0xFFF] on 1 byte boundary.
CR62, CR 63 (Default 0x00, 0x64 if PENKBC= 1 during POR, default 0x00 otherwise)
These two registers select the second KBC I/O base address [0x100:0xFFF] on 1 byte boundary.
CR70 (Default 0x01 if PENKBC= 1 during POR, default 0x00 otherwise)
Bit 7 - 4: Reserved.
Bit [3:0]: These bits select IRQ resource for KINT (keyboard).
CR72 (Default 0x0C if PENKBC= 1 during POR, default 0x00 otherwise)
Bit 7 - 4: Reserved.
Bit [3:0]: These bits select IRQ resource for MINT (PS2 Mouse)
CRF0 (Default 0x83)
Bit 7 - 6: KBC clock rate selection
= 00 Select 6MHz as KBC clock input.
= 01 Select 8MHz as KBC clock input.
= 10 Select 12Mhz as KBC clock input.
= 11 Select 16Mhz as KBC clock input.
Bit 5 - 3: Reserved.
Bit 2: = 0 Port 92 disable.
= 1 Port 92 enable.
Bit 1: = 0 Gate20 software control.
= 1 Gate20 hardware speed up.
Bit 0: = 0 KBRST software control.
= 1 KBRST hardware speed up.
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