MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 303

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Port H
Port H Data
Register
Data Direction
Register H
21-ports_a
MOTOROLA
NOTE:
Address: $000B
Address: $000F
Port H is a 4-bit, general-purpose bidirectional I/O port.
Port H is available only on the 64-pin QFP.
PORTH contains the latches for the four port H pins.
PH[3:0] — Port H Data Bits
Data direction register H determines whether each port H pin is an input
or an output. Writing a logic 1 to a DDRH bit enables the output buffer
for the corresponding port H pin; a logic 0 disables the output buffer.
Reset:
Reset:
Read:
Write:
Read:
Write:
These read/write bits are software programmable. Data direction of
each bit is under the control of the corresponding bit in data direction
register H. Reset has no effect on port H data.
Freescale Semiconductor, Inc.
For More Information On This Product,
Bit 7
Bit 7
0
0
0
Figure 24. Data Direction Register H (DDRH)
Go to: www.freescale.com
Figure 23. Port H Data Register (PORTH)
= Unimplemented
= Unimplemented
6
0
6
0
0
I/O Ports
5
0
5
0
0
Unaffected by Reset
4
0
4
0
0
DDRH3
PH3
3
3
0
DDRH2
PH2
2
2
0
MC68HC708XL36
DDRH1
PH1
1
1
0
I/O Ports
DDRH0
Bit 0
PH0
Bit 0
Port H
0
303