AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 18

• Manufacturer Part Number: AT83EC5123
• Description: (AT8xx512x) Smart Card Reader ICs
• Manufacturer: ATMEL Corporation

18
AT8xC5122/23
Table 10. Port Mode Register 0 - PMOD0 (91h) for AT8xC5123
Reset Value = 00xx 0xxxb
Table 11. Port Mode Register 1 - PMOD1 (84h) for AT8xC5122
Reset Value = 0000 0000b
Bit Number Bit Mnemonic Description
Bit Number
P5HC1
P3C1
7 - 6
7
5-4
2-0
7
7 - 6
5 - 4
3 - 2
1 - 0
3
CPRESRES
P5HC0
P3C1-P3C0
P3C0
Bit Mnemonic
P5MC1-P5MC0
P5HC1-P5HC0
P5LC1-P5LC0
6
6
P4C1-P4C0
-
P5MC1
Port 3 Configuration bits (Applicable to P3.0, P3.1, P3.3, P3.4 only)
00 Quasi bi-directional
01 Push-pull
10 Output Low Speed
11 Input with weak pull-up
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Card Presence Pull-up resistor
Cleared to connect the internal pull-up
Set to disconnect the internal pull-up
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
5
-
Description
Port 5 High Configuration bits (Applicable from P5.6 to P5.7 only)
00 Quasi bi-directional
01 Push-pull
10 Input with weak pull-down
11 Input with weak pull-up
Port 5 Medium Configuration bits (Applicable from P5.3 to P5.5 only)
00 Quasi bi-directional
01 Push-pull
10 Input with weak pull-down
11 Input with weak pull-up
Port 5 Low Configuration bits (Applicable from P5.0 to P5.2 only)
00 Quasi bi-directional
01 Push-pull
10 Input with medium pull-up
11 Input with weak pull-up
Port 4 Configuration bits (Applicable from P4.3 to P4.5 only)
00 Quasi bi-directional
01 Push-pull
10 Output Low Speed
11 Input with medium pull-up
P5MC0
4
-
4
CPRESRES
P5LC1
3
3
P5LC0
2
2
-
P4C1
1
1
-
4202B–SCR–07/03
P4C0
0
0
-