at75c220 ATMEL Corporation, at75c220 Datasheet - Page 68
at75c220
Manufacturer Part Number
at75c220
Description
Smart Internet Appliance Processor Siap
Manufacturer
ATMEL Corporation
Datasheet
1.AT75C220.pdf
(144 pages)
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PIO Status Register
Register Name:PIO_PSR
Access Type:Read-only
This register indicates which pins are enabled for PIO control. This register is updated when PIO lines are enabled or dis-
abled.
PIO Output Enable Register
Register Name:PIO_OER
Access Type:Write-only
This register is used to enable PIO output drivers. If the pin is driven by a peripheral, there is no effect on the pin but the
information is stored. The register is programmed as follows:
68
1 = PIO is active on the corresponding line (peripheral is inactive).
0 = PIO is inactive on the corresponding line (peripheral is active).
1 = Enables the PIO output on the corresponding pin.
0 = No effect.
P31
P23
P15
P31
P23
P15
P7
P7
31
23
15
31
23
15
7
7
P30
P22
P14
P30
P22
P14
30
22
14
P6
30
22
14
P6
6
6
AT75C220
P29
P21
P13
P29
P21
P13
P5
P5
29
21
13
29
21
13
5
5
P28
P20
P12
P28
P20
P12
28
20
12
P4
28
20
12
P4
4
4
P27
P19
P11
P27
P19
P11
P3
P3
27
19
11
27
19
11
3
3
P26
P18
P10
P26
P18
P10
26
18
10
P2
26
18
10
P2
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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