參數(shù)資料
型號(hào)： MC68HC05P18MDW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 108/144頁
文件大小： 1348K
代理商： MC68HC05P18MDW
Advance Information
MC68HC(8)05P18 — Rev. 2.0
66
Input/Output (I/O) Ports
MOTOROLA
Input/Output (I/O) Ports
7.5 Port C
Port C is an 8-bit bidirectional port which can share pins PC3–PC7 with
the A/D subsystem. The port C data register is located at address $0002
and its data direction register (DDR) is located at address $0006. Reset
does not affect the data registers, but clears the DDRs, thereby setting
all of the port pins to input mode. Writing a logic 1 to a DDR bit sets the
corresponding port pin to output mode (see Figure 7-3). Two port C
pins, PC0 and PC1, can source and sink a higher current than a typical
specifications.
Port C may be used for general I/O applications when the A/D
subsystem is disabled. The ADON bit in register ADSC is used to
enable/disable the A/D subsystem. Care must be exercised when using
pins PC0–PC2 while the A/D subsystem is enabled. Accidental changes
to bits that affect pins PC3–PC7 in the data or DDR registers will produce
unpredictable results in the A/D subsystem. See Section 9.
Figure 7-3. Port C I/O Circuitry
DATA
REGISTER BIT
DATA DIRECTION
REGISTER BIT
READ $0002
WRITE $0002
READ $0006
I/O
PIN
OUTPUT
INTERNAL
HC05
DATA BUS
RESET
(RST)
WRITE $0006
HIGH CURRENT
CAPABILITY, PC0
AND PC1 ONLY
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MC68HC05P1A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
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MC68HC05P1CDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
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