F81218 Datasheet, PDF (32/64 Pages) Feature Integration Technology Inc. – ISA/LPC to 6 UART Datasheet

F81218
3:0 SELURAIRQ[3:0] R/W In LPC mode , select the Serial IRQ channel.
In ISA mode , select one of six IRQ pins .
03h : use serial IRQ channel 3 in LPC mode or use ISA_IRQA in ISA
mode.
04h : use serial IRQ channel 4 in LPC mode or use ISA_IRQB in ISA
mode.
05h : use serial IRQ channel 5 in LPC mode or use ISA_IRQC in ISA
mode.
09h : use serial IRQ channel 9 in LPC mode or use ISA_IRQD in ISA
mode.
0Ah : use serial IRQ channel 10 in LPC mode or use ISA_IRQE in
ISA mode.
0Bh : use serial IRQ channel 11 in LPC mode or use ISA_IRQF in
ISA mode.
Otherwise will disable interrupt.
6.2.5 UART 1 Clock Select Register – index F0h
Power-on default [7:0] = 0x00h.
Bit
Name
R/W
Description
7:5 Reserved
R/W Return 0 when read.
4
RS485
R/W 0: The RTS# is controlled by programming MCR[1]. (offset +4)
1: The RTS# is drive high when transmitting data and sink low when
receiving data.
3
RXW4C_IRA
R/W 0 : No reception delay when SIR is changed from TX to RX.
1 : Reception delay 4 character-time when SIR is changed from TX
to RX.
2
TXW4C_IRA
R/W 0 : No transmission delay when SIR is changed from RX to TX.
1 : Transmission delay 4 character-time when SIR is changed from
RX to TX.
1:0 SELURACLK1 R/W 00 : UART 1 clock source is 1.8462MHz ( 24MHz/13 )
SELURACLK0
01/10/11 selection reserved.
-27-
August, 2007
V0.33P