
W83977TF
PRELIMINARY
Publication Release Date: March 1998
-106-
Revision 0.62
Bit 2: HDUPLX. IR half/full duplex function select.
= 0
The IR function is Full Duplex.
= 1
The IR function is Half Duplex.
Bit 1: TX2INV.
= 0
the SOUTB pin of UART B function or IRTX pin of IR function in normal condition.
= 1
inverse the SOUTB pin of UART B function or IRTX pin of IR function.
Bit 0: RX2INV.
= 0
the SINB pin of UART B function or IRRX pin of IR function in normal condition.
= 1
inverse the SINB pin of UART B function or IRRX pin of IR function
11.6 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.