W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 115
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W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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11.4
CR30 (Default 0x01
CR60, CR 61 (Default 0x03, 0xF8
CR70 (Default 0x04
CRF0 (Default 0x00)
11.5 Logical Device 3 (UART B)
CR30 (Default
CR60, CR 61 (Default 0x02, 0xF8
CR70 (Default 0x03
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.
Logical Device 2 (UART A)¢)
= 1 Activates the logical device.
= 0 Logical device is inactive.
= 00
= 01
= 10
= 11
= 1 Activates the logical device.
= 0 Logical device is inactive.
0x01 if
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)
if
if
if
PNPCSV
PNPCSV
PNPCSV
PNPCSV
= 0 during POR, default 0x00 otherwise)
= 0 during POR, default 0x00 otherwise)
= 0 during POR, default 0x00 otherwise)
= 0 during POR, default 0x00 otherwise)
if
if
PNPCSV
PNPCSV
-104-
= 0 during POR, default 0x00, 0x00 otherwise)
= 0 during POR, default 0x00, 0x00 otherwise)
Publication Release Date: March 1998
W83977TF
PRELIMINARY
Revision 0.62
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