参数资料
型号: MC68HC705PD6
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封装: QFP-80
文件页数: 117/165页
文件大小: 841K
代理商: MC68HC705PD6
July 7, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05PD6
INPUT/OUTPUT PORTS
MOTOROLA
REV 1.1
7-5
7.5.1 Port E MUX Register (PEMUX)
When PEM
x is set, the corresponding pin, PEx, is congure to port E output.
When PEM
x is clear, the corresponding pin, PEx, is congure to LCD output.
7.6
PORT F, PORT G AND PORT H
Port F, Port G and Port H serve one of two basic functions depending on the MCU
mode selected; LCD Frontplanes driver outputs, or general purpose I/O pins.
Their MUX Control Register (PFMUX, PGMUX, PHMUX) control the Port/LCD
muxing of corresponding Port on a bit-wide basis. These bits are cleared on reset,
and writing a 1 to any bit will turn that pin into a Port output. These outputs have
the capability to drive 10 mA sink current when (VOL
≤ Vss + 0.8V).
The data direction of a Port pin is determined by its corresponding DDR bit. When
a Port pin is programmed as an output by the corresponding DDR bit, data in the
PORT data register becomes output data to the pin and this data is returned when
PORT register is read.
7.6.1 Port F MUX Register (PFMUX)
When PFM
x is set, the corresponding pin, PFx, is congure to port F I/O.
When PFM
x is clear, the corresponding pin, PFx, is congure to LCD output.
W
R
PEMUX
$0004
reset
PEM7
0
7
00
54
0
0000
6
3210
PEM6
PEM4
PEM5
PEM3
PEM2
PEM0
PEM1
option
map
W
R
PFMUX
$000C
reset
PFM7
0
7
00
54
0
0000
6
3210
PFM6
PFM4
PFM5
PFM3
PFM2
PFM0
PFM1
option
map
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