參數(shù)資料
型號: HD40C4344R
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微電腦(4位單片微計算機)
文件頁數(shù): 51/100頁
文件大?。?/td> 610K
代理商: HD40C4344R
HD404344R Series/HD404394 Series
51
The timer B interrupt request flag is set by an overflow. Resetting the timer B interrupt request flag
(IFTB: $002, bit 0) is executed by either software or by an MCU reset.
External event counter operation: By setting the external event input as an input clock source, timer B
can operate as an external event counter. The D
0
/
INT
0
/EVNB pins are set to be
INT
0
/EVNB pins by
port mode register B (PMRB: $024).
The detection edge of the external event counter for timer B is selected as rising edge, falling edge, or
rising/falling edge by timer mode register B2 (TMB2: $026). When the rising/falling edge is selected,
the period must be set to more than 2t
cyc
between the falling edge and the rising edge.
Timer B is incremented by 1 using the edge selection in timer mode register B2 (TMB2: $026). Other
functions are based on the free-running/reload timer.
Timer counter B
(TCB)
÷
2
÷
4
÷
8
÷
3
÷
1
÷
5
÷
2
Timer mode
register B2
(TMB2)
EVNB
Selector
System
clock
PER
Prescaler S (PSS)
2
Edge
detector
Edge detection control
3
Timer write
register B lower
(TWBL)
Timer mode
register B1
(TMB1)
Timer write
register B upper
(TWBU)
Clock
Free-running
timer control
Timer read
register B lower
(TRBL)
Interrupt request
flag of timer B
(IFTB)
Timer read
register BU
(TRBU)
Overflow
I
Figure 26 Timer B Free-Running and Reload Operation Block Diagram
相關(guān)PDF資料
PDF描述
HD404342R 4-bit HMCS400-series microcomputer(4位單片微計算機)
HD404344R 4-bit HMCS400-series microcomputer(4位單片微計算機)
HD404391S 4-bit HMCS400-series microcomputer(4位單片微計算機)
HD404392S 4-bit HMCS400-series microcomputer(4位單片微計算機)
HD404341R 4-bit HMCS400-series microcomputer(4位單片微計算機)
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