XC68HC705JB3 Motorola, XC68HC705JB3 Datasheet - Page 56

• Manufacturer Part Number: XC68HC705JB3
• Description: MICROCONTROLLER
• Manufacturer: Motorola

GENERAL RELEASE SPECIFICATION
8.4
8.5
MOTOROLA
8-4
RTIE — Real Time Interrupt Enable
CTOFE — Timer Overflow Enable
RTIF — Real Time Interrupt Flag
CTOF — Timer Overflow Flag
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.
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.
The RTIE is an enable bit that allows generation of a TIMER Interrupt by the
RTIF bit.
The CTOFE is an enable bit that allows generation of a TIMER Interrupt upon
overflow of the Timer Counter Register.
The RTIF is a read-only flag bit.
The CTOF is a read-only flag bit.
1 = When set, the TIMER Interrupt is generated when the RTIF flag bit is
0 = When cleared, no TIMER interrupt caused by RTIF bit set will be
1 = When set, the TIMER Interrupt is generated when the CTOF flag bit
0 = When cleared, no TIMER interrupt caused by CTOF bit set will be
1 = Set when the output of the chosen (1 of 4 selections) Real Time
0 = Reset by writing a logical one to the RTIF acknowledge bit, RTIFR.
1 = Set when the 8-bit ripple counter rolls over from $FF to $00. A
0 = Reset by writing a logical one to the CTOF acknowledge bit,
set.
generated. This bit is cleared by reset.
is set.
generated. This bit is cleared by reset.
Interrupt stage goes active. A TIMER Interrupt request will be
generated if RTIE is also set.
Writing to the RTIF flag bit has no effect on its value. This bit is
cleared by reset.
TIMER Interrupt request will be generated if CTOFE is also set.
CTOFR. Writing to the CTOF flag bit has no effect on its value. This
bit is cleared by reset.
MULTI-FUNCTION TIMER
November 5, 1998
MC68HC05JB3
REV 1