參數(shù)資料
型號: MC68HC05P9ACDW
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, PDSO28
封裝: SOIC-28
文件頁數(shù): 123/158頁
文件大?。?/td> 3885K
代理商: MC68HC05P9ACDW
Parallel I/O Ports
Port A
Parallel I/O Ports
Port A
Port A is an 8-bit general-purpose I/O port.
Port A Data
Register (PORTA)
The port A data register contains a latch for each of the eight port A pins.
PA[7:0] — Port A Data Bits
These read/write bits are software programmable. Data direction of
each port A pin is under the control of the corresponding bit in data
direction register A. Reset has no effect on port A data.
$0006 Data Direction Register C (DDRC)
Read:
DDRC7 DDRC6 DDRC5 DDRC4 DDRC3 DDRC2 DDRC1 DDRC0
Write:
Reset:
00000000
$0007 Data Direction Register D (DDRD)
Read:
0
DDRD5
00000
Write:
Reset:
00000000
Addr.
Name:
R/W
Bit 7
654321
Bit 0
= Unimplemented
Figure 28. Parallel I/O Port Register Summary (Continued)
$0000
Bit 7
654321
Bit 0
Read:
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Write:
Reset:
Unaffected by reset
Figure 29. Port A Data Register (PORTA)
7-mc68hc05p9a
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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