W83977ATF Datasheet, PDF (144/207 Pages) Winbond – WINBOND I/O

W83977ATF
PRELIMINARY
CRF0 (Default 0x00)
Bit 7 - 4: Reserved.
Bit 3: RXW4C
= 0 No reception delay when SIR is changed from TX mode to RX mode.
= 1 Reception delays 4 characters-time (40 bit-time) when SIR is changed from TX mode
to RX mode.
Bit 2: TXW4C
= 0 No transmission delay when SIR is changed from RX mode to TX mode.
= 1 Transmission delays 4 characters-time (40 bit-time) when SIR is changed from RX
mode to TX mode.
Bit 1 : APEDCRC
= 0 No append hardware CRC value as data in FIR/MIR mode.
= 1 Append hardware CRC value as data in FIR/MIR mode.
Bit 0 : ENBNKSEL; Bank select enable
= 0 Disable IR Bank selection.
= 1 Enable IR Bank selection.
11.8 Logical Device 7 (GP I/O Port I)
CR30 (Default 0x00)
Bit 7 - 1: Reserved.
Bit 0: = 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x00, 0x00)
These two registers select GP1 I/O base address [0x100:0xFFF] on 1 byte boundary.
CR62, CR 63 (Default 0x00, 0x00)
These two registers select GP14 alternate function Primary I/O base address [0x100:0xFFE] on 2
byte boundary; they are available as you set GP14 to be an alternate function (General Purpose
Address Decode).
CR64, CR 65 (Default 0x00, 0x00)
These two registers select GP15 alternate function Primary I/O base address [0x100:0xFFF] on 1
byte boundary; they are available as you set GP15 to be an alternate function (General Purpose
Write Decode).
CR70 (Default 0x00)
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for GP10 as you set GP10 to be an alternate function
(Interrupt Steering).
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Publication Release Date:April 1998
Revision 0.52