at75c220 ATMEL Corporation, at75c220 Datasheet - Page 67

• Manufacturer Part Number: at75c220
• Description: Smart Internet Appliance Processor Siap
• Manufacturer: ATMEL Corporation

PIO Enable Register
Register Name:PIO_PER
Access Type:Write-only
This register is used to enable individual pins to be controlled by the PIO controller instead of the associated peripheral.
When the PIO is enabled, the associated peripheral (if any) is held at logic zero.
PIO Disable Register
Register Name: PIO_PDR
Access Type:Write-only
This register is used to disable PIO control of individual pins. When the PIO control is disabled, the normal peripheral func-
tion is enabled on the corresponding pin.
1 = Enables the PIO to control the corresponding pin (disables peripheral control of the pin).
0 = No effect.
1 = Disables PIO control (enables peripheral control) on the corresponding pin.
0 = No effect.
P31
P23
P15
P31
P23
P15
31
23
15
P7
31
23
15
P7
7
7
P30
P22
P14
P30
P22
P14
30
22
14
P6
30
22
14
P6
6
6
P29
P21
P13
P29
P21
P13
P5
P5
29
21
13
29
21
13
5
5
P28
P20
P12
P28
P20
P12
P4
P4
28
20
12
28
20
12
4
4
P27
P19
P11
P27
P19
P11
P3
P3
27
19
11
27
19
11
3
3
P26
P18
P10
P26
P18
P10
P2
P2
26
18
10
26
18
10
2
2
P25
P17
P25
P17
P9
P1
P9
P1
25
17
25
17
9
1
9
1
P24
P16
P24
P16
24
16
P8
P0
24
16
P8
P0
8
0
8
0
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