參數資料
型號: MC68HLC705KJ1CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數: 100/117頁
文件大?。?/td> 1644K
代理商: MC68HLC705KJ1CDW
Multifunction Timer Module
I/O Registers
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
Multifunction Timer Module
83
9.5 I/O Registers
The following registers control and monitor the timer operation:
Timer status and control register (TSCR)
Timer counter register (TCR)
9.5.1 Timer Status and Control Register
The read/write timer status and control register performs the following functions:
Flags timer interrupts
Enables timer interrupts
Resets timer interrupt flags
Selects real-time interrupt rates
TOF — Timer Overflow Flag
This read-only flag becomes set when the first eight stages of the counter roll
over from $FF to $00. TOF generates a timer overflow interrupt request if TOIE
is also set. Clear TOF by writing a logic 1 to the TOFR bit. Writing to TOF has
no effect. Reset clears TOF.
RTIF — Real-Time Interrupt Flag
This read-only flag becomes set when the selected RTI output becomes active.
RTIF generates a real-time interrupt request if RTIE is also set. Clear RTIF by
writing a logic 1 to the RTIFR bit. Writing to RTIF has no effect. Reset clears
RTIF.
TOIE — Timer Overflow Interrupt Enable Bit
This read/write bit enables timer overflow interrupts. Reset clears TOIE.
1 = Timer overflow interrupts enabled
0 = Timer overflow interrupts disabled
RTIE — Real-Time Interrupt Enable Bit
This read/write bit enables real-time interrupts. Reset clears RTIE.
1 = Real-time interrupts enabled
0 = Real-time interrupts disabled
Address:
$0008
Bit 7
654321
Bit 0
Read:
TOF
RTIF
TOIE
RTIE
00
RT1
RT0
Write:
TOFR
RTIFR
Reset:
00000011
= Unimplemented
Figure 9-3. Timer Status and Control Register (TSCR)
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