參數(shù)資料
型號: M30201M4T
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數(shù): 61/159頁
文件大?。?/td> 2319K
代理商: M30201M4T
Unde
Timer B
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
61
Item
Specification
Count source
Count operation
f
1
, f
8
, f
32
, f
C32
Counts down
When the timer underflows, it reloads the reload register contents before
continuing counting
1/(n+1)
n : Set value
Count start flag is set (= 1)
Count start flag is reset (= 0)
The timer underflows
Programmable I/O port
Count value is read out by reading timer Bi register
When counting stopped
When a value is written to timer Bi register, it is written to both reload register and counter
When counting in progress
When a value is written to timer Bi register, it is written to only reload register
(Transferred to counter at next reload time)
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TBi
IN
pin function
Read from timer
Write to timer
(1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table 1.18.) Figure 1.51 shows
the timer Bi mode register in timer mode.
Table 1.18. Timer specifications in timer mode
Timer Bi mode register
b7
b6 b5
b4
b3
AA
Symbol
TBiMR(i=0, 1)
Address
When reset
00XX0000
2
039B
16
to 039C
16
Bit name
Function
Bit symbol
AA
AA
AA
b2
b1 b0
0
AA
Operation mode select bit
0 0 : Timer mode
b1 b0
TMOD1
TMOD0
MR0
MR1
Invalid in timer mode
Can be “0” or “1”
MR3
0 0 : f
1
0 1 : f
8
1 0 : f
32
1 1 : f
C32
TCK1
TCK0
Count source select bit
0
Invalid in timer mode.
This bit can neither be set nor reset. When read in timer mode,
its content is indeterminate.
b7 b6
AA
AA
A
Nothing is assigned.
When write, set "0". When read, their contents are indeterminate.
Figure 1.51. Timer Bi mode register in timer mode
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