mc9s08dz32amlfr Freescale Semiconductor, Inc, mc9s08dz32amlfr Datasheet - Page 129

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

6.5.8
Port H is controlled by the registers listed below.
6.5.8.1
6.5.8.2
Freescale Semiconductor
PTHDD[7:0]
PTHD[7:0]
Reset:
Reset:
Field
Field
7:0
7:0
W
W
R
R
PTHDD7
PTHD7
Port H Registers
Port H Data Register Bits — For port H pins that are inputs, reads return the logic level on the pin. For port H
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 H pins that are configured as outputs, the logic level is
driven out the corresponding MCU pin.
Reset forces PTHD 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 H Bits — These read/write bits control the direction of port H pins and what is read for
PTHD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port H bit n and PTHD reads return the contents of PTHDn.
Port H Data Register (PTHD)
0
Port H Data Direction Register (PTHDD)
0
7
7
PTHDD6
PTHD6
0
0
6
6
Figure 6-48. Port H Data Direction Register (PTHDD)
Table 6-46. PTHDD Register Field Descriptions
Table 6-45. PTHD Register Field Descriptions
Figure 6-47. Port H Data Register (PTHD)
MC9S08DZ128 Series Data Sheet, Rev. 1
PTHDD5
PTHD5
0
0
5
5
PTHDD4
PTHD4
0
0
4
4
Description
Description
PTHDD3
PTHD3
3
0
3
0
PTHDD2
PTHD2
Chapter 6 Parallel Input/Output Control
0
0
2
2
PTHDD1
PTHD1
0
0
1
1
PTHDD0
PTHD0
0
0
0
0
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