MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 44

• Manufacturer Part Number: MC68HC711PH8
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
• Manufacturer: Motorola

2
2.11.8
Port H is an 8-bit general purpose I/O port with a data register (PORTH) and a data direction
register (DDRH). Port H pins support either input/output, pulse-width modulation channels (pins
[3:0]) or act as clock inputs for two of the 8-bit modulus timers (pins [7,6]).
PORTH can be read at any time and always returns the pin level.
Port H pins include on-chip pull-up devices that can be enabled or disabled via the port pull-up
assignment register (PPAR). Port H pins can be configured for wired-OR interrupt to wake-up from
WAIT or STOP mode under control of the wired-OR interrupt register (WOIEH).
For further information, refer to Section 4 and Section 8 (timer system).
2.12
The MC68HC11PH8 incorporates an LCD module that allows four LCD segments to be driven
under control of the LCD control and data register. The four frontplane signals are output on port
B pins [7:4], with the backplane signal output on PG6. A segment is ON when the corresponding
frontplane and backplane are equal in frequency and opposite in phase. The LCD function can be
enabled in any mode.
2.12.1
LCD[7:4] — LCD segment data
When LCD[7:4] are all cleared, the LCD backplane is forced low
off, thus reducing power consumption and RFI emissions.
MOTOROLA
2-18
LCD control and data (LCDR)
†
1 (set)
0 (clear) –
This is not the case on early versions of the MC68HC711PH8; contact your local Motorola
Sales Representative for more information.
Port H
LCD module
LCDR — LCD control and data register
–
Segment ON (corresponding LCD output port B is opposite in phase
to LCDBP).
Segment OFF (corresponding LCD output port B is in phase with
LCDBP).
Address
$002D
LCD7
bit 7
PIN DESCRIPTIONS
LCD6
bit 6
LCD5
bit 5
LCD4
bit 4
bit 3
0
†
and all the LCD segments are
bit 2
0
LCDCK LCDE 0000 0000
bit 1
MC68HC11PH8
bit 0
on reset
State
TPG