參數(shù)資料
型號: MC68HC05PD6
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 140/165頁
文件大?。?/td> 841K
代理商: MC68HC05PD6
GENERAL RELEASE SPECIFICATION
July 7, 1997
MOTOROLA
TIMER SYSTEM
MC68HC05PD6
9-4
REV 1.1
Figure 9-3. Timer State Timing Diagram for Reset
Figure 9-4. Timer State Timing Diagram for Timer Overow
$FFFC
$FFFD
$FFFE
$FFFF
Internal Processor
Clock
Internal
Reset
T00
T01
T10
T11
Counter (16 Bit)
RESET (External,
LVR or POR)
Internal
Timer
Clocks
NOTE: The Counter Register and Timer Control Register are the only ones
affected by RESET
$FFFE
$0000
$0001
$0002
Internal Processor
Clock
T00
T01
T10
T11
Counter (16 Bit)
Timer Overflow
Flag (TOF)
Internal
Timer
Clocks
NOTE: The TOF bit is set at timer state T11 (transition of counter from $FFFF to
$0000). It is cleared by read of the timer status register during the internal
processor clock high time followed by a read of the counter low register.
$FFFF
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