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參數資料
型號: MC68HC05X4
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數: 66/156頁
文件大小: 926K
代理商: MC68HC05X4
Parallel input/output ports
MC68HC05X4 Rev 1.0
66
Parallel input/output ports
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Port registers
The following sections explain in detail the individual bits in the data and
control registers associated with the ports.
Port A data
register (PADR)
Each bit can be configured as input or output via the corresponding data
direction bit in the port A DDR.
Reset does not affect the state of this register.
NOTE:
If the AWPS bit in the PCR is set then this location becomes the port A
wired-OR interrupt enable register. Writing a ‘1’ to any bit enables WOI
on the corresponding port A line.
Port B data register
(PBDR)
Each bit can be configured as input or output via the corresponding data
direction bit in the port B DDR.
Reset does not affect the state of this register.
Port configuration
register (PCR)
WOIF — Wired-OR interrupt flag
1 = Indicates that a wired-OR interrupt has been received. A CPU
interrupt request is generated if WOIE is set on port A or port B.
0 = The flag is cleared by writing a ‘0’ to it.
TIMEN — Timer enable
CAF — Indicates when MCAN is asleep
Address:
$0005
Bit 7
6
5
4
3
2
1
Bit 0
WOIF
TIMEN
CAF
BPDE0
BWE
AWPS
Reset:
-
-
0
0
0
0
0
0
Figure 2. Port Configuration Register (PCR)
4-ports
F
Freescale Semiconductor, Inc.
n
.
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