F81218 Datasheet, PDF (39/64 Pages) Feature Integration Technology Inc. – ISA/LPC to 6 UART Datasheet

F81218
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 the interrupt.
6.5.5 UART 4 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.
3:2 Reserved
R/W Return 0 when read.
1:0 SELURCCLK1 R/W 00 : UART 3 clock source is 1.8462MHz ( 24MHz/13 )
SELURCCLK0
01/10/11 selection reserved.
6.6 UART 5 Device Control Register (LDN 4)
6.6.1 Device Enable Register – index 30h
Power-on default [7:0] = 0x01h when SOUT5/PS_338_IRQE is pull-up, else 0x00h.
Bit
Name
R/W
Description
7:1 Reserved
R/W Return 0 when read.
0
URE_EN
R/W 0 : Disable UART 5.
1 : Enable UART 5.
6.6.2 I/O Port Select Register – index 60h
Power-on default [7:0] = 0x03h when SOUT5/PS_338_IRQE is pull-up, else 0x00h.
Bit
Name
R/W
Description
7:0 URE_BASE[15:8] R/W UART 5 I/O Port Address high byte.
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August, 2007
V0.33P