參數(shù)資料
型號: MC68HC05JB3JP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 101/148頁
文件大?。?/td> 1600K
代理商: MC68HC05JB3JP
GENERAL RELEASE SPECIFICATION
November 5, 1998
MOTOROLA
MULTI-FUNCTION TIMER
MC68HC05JB3
8-4
REV 1
RTIE — Real Time Interrupt Enable
The RTIE is an enable bit that allows generation of a TIMER Interrupt by the
RTIF bit.
1 =
When set, the TIMER Interrupt is generated when the RTIF ag bit is
set.
0 =
When cleared, no TIMER interrupt caused by RTIF bit set will be
generated. This bit is cleared by reset.
CTOFE — Timer Overow Enable
The CTOFE is an enable bit that allows generation of a TIMER Interrupt upon
overow of the Timer Counter Register.
1 =
When set, the TIMER Interrupt is generated when the CTOF flag bit
is set.
0 =
When cleared, no TIMER interrupt caused by CTOF bit set will be
generated. This bit is cleared by reset.
RTIF — Real Time Interrupt Flag
The RTIF is a read-only ag bit.
1 =
Set when the output of the chosen (1 of 4 selections) Real Time
Interrupt stage goes active. A TIMER Interrupt request will be
generated if RTIE is also set.
0 =
Reset by writing a logical one to the RTIF acknowledge bit, RTIFR.
Writing to the RTIF ag bit has no effect on its value. This bit is
cleared by reset.
CTOF — Timer Overow Flag
The CTOF is a read-only ag bit.
1 =
Set when the 8-bit ripple counter rolls over from $FF to $00. A
TIMER Interrupt request will be generated if CTOFE is also set.
0 =
Reset by writing a logical one to the CTOF acknowledge bit,
CTOFR. Writing to the CTOF flag bit has no effect on its value. This
bit is cleared by reset.
8.4
OPERATION DURING STOP MODE
When STOP is exited by an external interrupt or an LVR reset or an external
RESET, the internal oscillator will resume, followed by a 224 or 4064 internal pro-
cessor oscillator stabilization delay.
8.5
COP CONSIDERATION DURING STOP MODE
In STOP mode, the clock to the Watchdog Timer is stopped and is therefore
impossible to generate COP reset when in STOP mode. The COP function will
resume 224 or 4064 cycles after exiting from STOP.
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