參數(shù)資料
型號: MC68HC705E6
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 39/140頁
文件大?。?/td> 788K
代理商: MC68HC705E6
Input/Output Ports
Port C
MC68HC05E6 — Rev. 1.0
Input/Output Ports
5-ports
NOTE:
PC6 and PC7 are not available in the 28-pin package.
Keyboard/timer
register (KEY/TIM)
KSF — Keyboard status flag
1 = This read-only flag is set when there is a high to low transition
on any of the port C pins configured as inputs.
0 = No high to low transition has been detected on any of the port
C pins configured as inputs.
Writing a ‘1’ to KIRST will clear the interrupt status flag.
Figure 9 Port C keyboard interrupt function
V
DD
Latched
register
Input
buffer
Edge
detect
DDRn
Output
data buffer
Output
buffer
KIE bit
Internal
interrupt
Bit x
CONFC
PCx
PC0–PC7
DBx
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Keyboard/timer (KEY/TIM)
$000A
KSF
KIE
KIRST
SEL1
SEL0 0000 0000
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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