Rainbow Electronics AT89C5122 - Manual (Page 62)

62
AT8xC5122/23
4202E–SCR–06/06
Reset Value = 0000 0000b
Reset Value = xxxx 00xxb
Table 38. Port Mode Register 1 - PMOD1 (84h) for AT8xC5122
7 6 5 4 3 2 1 0
P5HC1 P5HC0 P5MC1 P5MC0 P5LC1 P5LC0 P4C1 P4C0
Bit Number Bit Mnemonic Description
7 - 6 P5HC1-P5HC0
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
5 - 4 P5MC1-P5MC0
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
3 - 2 P5LC1-P5LC0
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
1 - 0 P4C1-P4C0
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
Table 39. Port Mode Register 1 - PMOD1 (84h) for AT83C5123
7 6 5 4 3 2 1 0
- - - - P5LC1 P5LC0 - -
Bit Number Bit Mnemonic Description
7 - 4
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3 - 2 P5LC1-P5LC0
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
1 - 0
Reserved
The value read from this bit is indeterminate. Do not set this bit.