參數(shù)資料
型號: HD404652S
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 50/109頁
文件大?。?/td> 430K
代理商: HD404652S
HD404654 Series
50
Watchdog on
flag (WDON)
System
reset signal
Timer C interrupt
flag (IFTC)
Timer output
control logic
Timer read register CU (TRCU)
Timer output
control
Timer read
register CL
(TRCL)
Clock
Timer counter C
(TCC)
Selector
System
clock
Prescaler S (PSS)
Overflow
I
Timer write
register CU
(TWCU)
Timer write
register CL
(TWCL)
Timer mode
register C1
(TMC1)
Timer mode
register C2
(TMC2)
Free-running
/reload control
Watchdog timer
control logic
TOC
PER
÷
2
÷
4
÷
8
÷
3
÷
1
÷
5
÷
1
÷
2
3
3
Figure 35 Block Diagram of Timer C
Timer C Operations:
Free-running/reload timer operation: The free-running/reload operation, input clock source, and
prescaler division ratio are selected by timer mode register C1 (TMC1: $00D).
Timer C is initialized to the value set in timer write register C (TWCL: $00E, TWCU: $00F) by
software and incremented by one at each clock input. If an input clock is applied to timer C after it has
reached $FF, an overflow is generated. In this case, if the reload timer function is enabled, timer C is
initialized to its initial value set in timer write register C; if the free-running timer function is enabled,
the timer is initialized to $00 and then incremented again.
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