w83877atd Winbond Electronics Corp America, w83877atd Datasheet - Page 136

• Manufacturer Part Number: w83877atd
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

8.2.35 Configuration Registers (CR2B)
When the device is in Extended Function mode and EFIR is 2BH, the CR2B register can be accessed
through EFDR. This register default value is 00
Bit 7~6: PIN1FUN1~0 - Pin 1 function select.
* Note that: IRQMODS is defined in CR31.Bit2, that is, the IRQ mode selection bit.
Bit 5-4: PIN2FUN1~0 - Pin 2 function select.
Bit 3-2: PIN3FUN1~0 - Pin 3 function select.
IRQMODS
PIN2FUN1
PIN3FUN1
0
0
0
0
1
0
0
1
1
0
0
1
1
*
7
PIN1FUN1
PIN2FUN0
PIN3FUN0
6
X
0
0
1
1
0
1
0
1
0
1
0
1
5
4
3
16
- 132 -
. The bit definitions are as follows:
2
IRRXH/IRSL0
PIN1FUN0
nDACK_D
Reserved
Reserved
PDCIN
IRSL1
1
Pin 2
Pin 3
nCS
A11
X
0
1
0
1
0
PIN93FUN0
PIN93FUN1
PIN3FUN0
PIN3FUN1
PIN2FUN0
PIN2FUN1
PIN1FUN0
PIN1FUN1
Publication Release Date: April 1998
Reserved
PCICLK
DRQ_D
W83877ATF
IRQ_G
IRSL2
Pin 1
Version 0.51