W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 82

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

8.9.4 Peripheral I/O Data Register
Value after reset: 00
Only for PLCC 68 pins :
IO3
On read operation, the present value of pin IO3 is read.
On write operation, the data is driven to pin IO3 only if PCTL:OE3=1.
Note: The ACLT2: INT1M bit should be set to “0”, INT1/IO3 pin can be as IO. Otherwise, It is configured as
interrupt input.
IO2
On read operation, the present value of pin IO2 is read.
On write operation, the data is driven to pin IO2 only if PCTL:OE2=1.
Note: The ACLT2: INT0M bit should be set to “0”, INT0/IO2 pin can be as IO. Otherwise, It is configured as
interrupt input.
IO1
On read operation, the present value of pin IO1 is read.
On write operation, the data is driven to pin IO1 only if PCTL:OE1=1.
IO0 Read or Write Data of Pin IO0
On read operation, the present value of pin IO0 is read.
On write operation, the data is driven to pin IO0 only if PCTL:OE0=1.
7
0
Read or Write Data of Pin IO3
Read or Write Data of Pin IO2
Read or Write Data of Pin IO1
6
0
5
0
4
0
IO3
3
82
IO2
2
PIODR
IO1
1
Read/Write
IO0
Preliminary W6691
0
Publication Release Date: Sep 2001
Address 3BH
Revision 1.1