參數(shù)資料
型號: HD40A4358
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer
中文描述: 4位HMCS400系列微機
文件頁數(shù): 46/100頁
文件大小: 398K
代理商: HD40A4358
HD404358 Series
46
Timer B
Timer B Functions:
Timer B has the following functions.
Free-running/reload timer
External event counter
Input capture timer
The block diagram for each operation mode of timer B is shown in figures 31 and 32.
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 signal
3
Timer write
register B lower
(TWBL)
Timer mode
register B1
(TMB1)
Timer write
register B upper
(TWBU)
Clock
Free-running
timer control
signal
Timer read
register B lower
(TRBL)
Interrupt request
flag of timer B
(IFTB)
Timer read
register B upper
(TRBU)
Overflow
I
Figure 31 Timer B Free-Running and Reload Operation Block Diagram
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