w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 97

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

12.4 Logical Device 2 (UART A)¢)
CR30 (Default 0x01 if PNPCSV# = 0 during POR, default 0x00 otherwise)
CR60, CR 61 (Default 0x03, 0xF8 if PNPCSV# = 0 during POR, default 0x00, 0x00 otherwise)
CR70 (Default 0x04 if PNPCSV# = 0 during POR, default 0x00 otherwise)
CRF0 (Default 0x00)
12.5 Logical Device 3 (UART B)
CR30 (Default 0x01 if PNPCSV# = 0 during POR, default 0x00 otherwise)
CR60, CR 61 (Default 0x02, 0xF8 if PNPCSV# = 0 during POR, default 0x00, 0x00 otherwise)
CR70 (Default 0x03 if PNPCSV# = 0 during POR, default 0x00 otherwise)
Bit 7 - 1: Reserved.
Bit 0:
These two registers select Serial Port 1 I/O base address [0x100:0xFF8] on 8 byte boundary.
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for Serial Port 1.
Bit 7 - 2: Reserved.
Bit 1 - 0: SUACLKB1, SUACLKB0
Bit 7 - 1: Reserved.
Bit 0:
These two registers select Serial Port 2 I/O base address [0x100:0xFF8] on 8 byte boundary.
Bit 7 - 4: Reserved.
Bit [3:0]: These bits select IRQ resource for Serial Port 2.
= 1 Activates the logical device.
= 0 Logical device is inactive.
= 00
= 01
= 10
= 11
= 1 Activates the logical device.
= 0 Logical device is inactive.
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)
W83977EF-AW/W83977EG-AW
-95-
Publication Release Date: Apr. 2006
Revision 1.2