参数资料
型号: MC68HC705CL16
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 1.802 MHz, MICROCONTROLLER, PQFP100
封装: TQFP-100
文件页数: 116/145页
文件大小: 673K
代理商: MC68HC705CL16
GENERAL RELEASE SPECIFICATION
June 11, 1997
MOTOROLA
TIMER
MC68HC05CL48
8-20
REV 2.0
Figure 8-7. ONE Second Watch Timer
8.3.1 Watch Timer Control & Status Register (WTCSR)
WTOFF
1 =
Disable Watch Timer
0 =
Enable Watch Timer
WTR
Writing a ‘1’ to this bit will generate a reset pulse to reset the Watch Timer.
Reading this bit will always return a ‘0’.
WTOIE
1 =
Enable 1 second interrupt.
0 =
Disable 1 second interrupt.
WTOF
1 =
Flag set by transition of the 15-bit free running counter from $7FFF
to $0000
0 =
Flag cleared by writing a 0 to the WTOF bit.
7654
3
210
WTCSR
$0023
READ
WTOFF
0
WTOIE
WTOF
WRITE
WTR
RESET
----
0
U = UNAFFECTED
15-bit
Free Running
Counter
32kHz
External Clock
WTOIE
WRT
WTOFF
WTOF
RESET
OFF
1 second overow
WTimer Interrupt
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