W83977G-A Nuvoton Technology Corporation of America, W83977G-A Datasheet - Page 138

• Manufacturer Part Number: W83977G-A
• Description: IC I/O CONTROLLER 128-PQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83977G-A

• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.4 Logical Device 2 (UART A)¢)
CR30 (Default 0x01 when PNPCSV=0 at POR)
CR31
CR60, CR 61 (Default 0x03, 0xF8 when PNPCSV=0 at POR )
CR70 (Default 0x04 when PNPCSV=0 at POR)
CR71(Default 0x02, read only)
CRF0 (Default 0x00)
Bit 7-1 : Reserved.
Bit 0 :
= 1 Activates the logical device.
= 0 Logical device is inactive.
Bit 7-2 : Reserved.
Bit 1 : ENRNGCK -- > Enable I/O Range check
Bit 0 : FORIORD --> Forces LDN to respond I/O read
These two registers select Serial Port 1 I/O base address [0x100:0xFF8] on 8 byte boundaries.
Bit 7-4 : Reserved.
Bit [3:0] : These bits select IRQ resource for Serial Port 1.
Bit 7-2 : Reserved.
Bit 1 : IRQLEV -- > IRQ Level
= 1: High; = 0: Low
Bit 0 : IRQTYPE --> IRQ Type
= 1: Level trigger; = 0: Edge trigger
Bit 7-2 : Reserved.
Bit 1-0 : SUACLKB1, SUACLKB0
= 00
= 01
= 10
= 11
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
UART A clock source is 1.8462 Mhz (24MHz/13)
UART A clock source is 2 Mhz (24MHz/12)
UART A clock source is 24 Mhz (24MHz/1)
UART A clock source is 14.769 Mhz (24MHz/1.625)
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