MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 87
MC68HC711PH8
Manufacturer Part Number
MC68HC711PH8
Description
High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
Manufacturer
Motorola
Datasheet
1.MC68HC711PH8.pdf
(264 pages)
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4.8
Port H is an 8-bit bidirectional port, with both data and data direction registers. In addition to their
I/O capability, port H pins are shared with modulus timer and PWM functions, as shown in the
following table. Each port H pin configured as an input can be used as a keyboard interrupt, if
enabled (See Section 4.8.3).
On reset the pins are configured as general purpose high-impedance inputs with selectable
internal pull-ups (see Section 4.9).
4.8.1
This is a read/write register and is not affected by reset. The bits may be read and written at any
time, but when one of the pins PH[3:0] is allocated to its alternate function of PWM channel, a write
to the corresponding register bit has no affect on the pin state.
4.8.2
DDH[7:0] — Data direction for port H
MC68HC11PH8
Data direction H (DDRH)
Port H data (PORTH)
1 (set)
0 (clear) –
Port H
PORTH — Port H data register
DDRH — Data direction register for port H
–
The corresponding pin is configured as an output.
The corresponding pin is configured as an input.
PH0
PH1
PH2
PH3
PH4
PH5
PH6
PH7
Pin
Address
Address
$007C
$007D
Modulus timer C clock input
Modulus timer B clock input
PARALLEL INPUT/OUTPUT
DDH7 DDH6 DDH5 DDH4 DDH3 DDH2 DDH1 DDH0 0000 0000
bit 7
PH7
bit 7
Alternate
function
PW1
PW2
PW3
PW4
Ñ
Ñ
bit 6
PH6
bit 6
PH5
bit 5
bit 5
bit 4
PH4
bit 4
See Section 8 for
more information.
PH3
bit 3
bit 3
bit 2
PH2
bit 2
PH1
bit 1
bit 1
bit 0
PH0
bit 0
MOTOROLA
undeÞned
on reset
on reset
State
State
TPG
4-9
4
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