參數(shù)資料
型號(hào): MC68HC05PD6
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 118/165頁
文件大小: 841K
代理商: MC68HC05PD6
GENERAL RELEASE SPECIFICATION
July 7, 1997
MOTOROLA
INPUT/OUTPUT PORTS
MC68HC05PD6
7-6
REV 1.1
7.6.2 Port G MUX Register (PGMUX)
When PGM
x is set, the corresponding pin, PGx, is congure to port G I/O.
When PGM
x is clear, the corresponding pin, PGx, is congure to LCD output.
7.6.3 Port H MUX Register (PHMUX)
When PHM
x is set, the corresponding pin, PHx, is congure to port H I/O.
When PHM
x is clear, the corresponding pin, PHx, is congure to LCD output.
7.7
INPUT/OUPUT PROGRAMMING
Bidirectional port lines may be programmed as an input or an output under
software control. The direction of the pins is determined by the state of the
corresponding bit in the port data direction register (DDR). Each port has an
associated DDR. Any I/O port pin is congured as an output if its corresponding
DDR bit is set. A pin is congured as an input if its corresponding DDR bit is
cleared.
During Reset, all DDRs are cleared, which congure all port pins as inputs. The
data direction registers are capable of being written to or read by the processor.
During the programmed output state, a read of the data register actually reads the
value of the output data latch and not the I/O pin. See Figure 7-1 and Table 7-1.
W
R
PGMUX
$000D
reset
PGM7
0
7
00
54
0
0000
6
3210
PGM6
PGM4
PGM5
PGM3
PGM2
PGM0
PGM1
option
map
W
R
PHMUX
$000E
reset
PHM7
0
7
00
54
0
0000
6
3210
PHM6
PHM4
PHM5
PHM3
PHM2
PHM0
PHM1
option
map
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