mc9s08dz32amlfr Freescale Semiconductor, Inc, mc9s08dz32amlfr Datasheet - Page 113

• Manufacturer Part Number: mc9s08dz32amlfr
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

6.5.3
Port C is controlled by the registers listed below.
6.5.3.1
6.5.3.2
Freescale Semiconductor
PTCDD[7:0]
PTCD[7:0]
Reset:
Reset:
Field
Field
7:0
7:0
W
W
R
R
PTCDD7
PTCD7
Port C Registers
Port C Data Register Bits — For port C pins that are inputs, reads return the logic level on the pin. For port C
pins that are configured as outputs, reads return the last value written to this register.
Writes are latched into all bits of this register. For port C pins that are configured as outputs, the logic level is
driven out the corresponding MCU pin.
Reset forces PTCD to all 0s, but these 0s are not driven out the corresponding pins because reset also
configures all port pins as high-impedance inputs with pull-ups disabled.
Data Direction for Port C Bits — These read/write bits control the direction of port C pins and what is read for
PTCD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port C bit n and PTCD reads return the contents of PTCDn.
Port C Data Register (PTCD)
0
Port C Data Direction Register (PTCDD)
0
7
7
PTCDD6
PTCD6
0
0
6
6
Figure 6-20. Port C Data Direction Register (PTCDD)
Table 6-18. PTCDD Register Field Descriptions
Table 6-17. PTCD Register Field Descriptions
Figure 6-19. Port C Data Register (PTCD)
MC9S08DZ128 Series Data Sheet, Rev. 1
PTCDD5
PTCD5
0
0
5
5
PTCDD4
PTCD4
0
0
4
4
Description
Description
PTCDD3
PTCD3
3
0
3
0
PTCDD2
PTCD2
Chapter 6 Parallel Input/Output Control
0
0
2
2
PTCDD1
PTCD1
0
0
1
1
PTCDD0
PTCD0
0
0
0
0
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