ST90158 - I/O PORTS
INPUT/OUTPUT BIT CONFIGURATION (Cont’d)
Figure 49. Control Bits
Bit 7
Bit n
Bit 0
PxC2
PxC1
PxC0
PxC27
PxC17
PxC07
PxC2n
PxC1n
PxC0n
PxC20
PxC10
PxC00
n
Table 19. Port Bit Configuration Table (n = 0, 1... 7; X = port number)
General Purpose I/O Pins
A/D Pins
PXC2n
PXC1n
PXC0n
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
1
1
1
PXn Configuration
PXn Output Type
BID
BID
OD
OUT
PP
OUT
OD
IN
IN
AF OUT AF OUT
AF IN
(1)
WP OD
HI-Z
HI-Z
PP
OD
HI-Z
TTL
(or Schmitt
TTL
(or Schmitt
TTL
(or Schmitt
Trigger)
TTL
(or Schmitt
Trigger)
CMOS
(or Schmitt
Trigger)
TTL
(or Schmitt
Trigger)
TTL
(or Schmitt
Trigger)
TTL
(or Schmitt
Analog
Input
PXn Input Type
Trigger)
Trigger)
Trigger)
(1)
For A/D Converter inputs.
Legend:
X
= Port
n
= Bit
AF
= Alternate Function
BID = Bidirectional
CMOS= CMOS Standard Input Levels
HI-Z = High Impedance
IN
= Input
OD = Open Drain
OUT = Output
PP
= Push-Pull
TTL = TTL Standard Input Levels
WP = Weak Pull-up
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ETC [ ETC ]
