W83L517D Datasheet, PDF (125/138 Pages) Winbond – LPC SUPER I/O

9.8 Logical Device 6 (FIR)
CR30 (Default 0x00h)
Bit 7 - 1: Reserved.
Bit 0:
= 1 Activates the logical device.
= 0 Logical device is inactive.
W83L517D
Version 0.6
CR60, CR 61 (Default 0x00h, 0x00h)
These two registers select IR I/O base address [0x100h : 0xFF8h] on 8 byte boundary.
CR70 (Default 0x00h)
Bit 7 - 4: Reserved.
Bit [3:0]: These bits select IRQ resource for IR
CR74 (Default 0x04h)
Bit 7-3 : Reserved.
Bit 2-0 : These bits select DRQ resource for RX of FIR.
= 0x00h DMA0
= 0x01h DMA1
= 0x02h DMA2
= 0x03h DMA3
= 0x04h - 0x07h No DMA active
CR75 (Default 0x04h)
Bit 7-3 : Reserved.
Bit 2-0 : These bits select DRQ resource for TX of FIR.
= 0x00h DMA0
= 0x01h DMA1
= 0x02h DMA2
= 0x03h DMA3
= 0x04h - 0x07h No DMA active
CRF0 (Default 0x00h)
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
to RX mode.
mode
118
Publication Release Date: Apr. 2000
Revision 0.60