參數(shù)資料
型號: M30240M5-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
封裝: 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù): 115/139頁
文件大?。?/td> 1453K
代理商: M30240M5-XXXFP
77
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Specifications REV. G
Specifications in this manual are tentative and subject to change
Timer B
Figure 1.72: Timer B-related registers (2)
1.2.22.1 Timer mode
In this mode, the timer counts an internally generated count source as shown in Table 1.23 .
Table 1.23:
Timer B timer specifications in timer mode
Note: Timer B2 does not generate an interrupt; it is used as a prescaler only.
Item
Specification
Count source
f1, f8, f32
Count operation
Counts down
When the timer underflows, it reloads the reload register contents before continuing counting
Divide ratio
1/(n+1)
n: Set value
Count start condition
Count start flag is set (= 1)
Count stop condition
Count start flag is reset (= 0)
Interrupt request
generation timing
The timer underflows (see Note)
Read from timer
Count value is read out by reading timer Bi register
Write to timer
When counting stopped
When a value is written to Timer Bi register, it is written to both reload register and counter
When counting is in progress
When a value is written to Timer Bi register, it is written to only reload register
(Transferred to counter at the next reload time)
Symbol
Address
When reset
TABSR
038016
0016
Count start flag
Bit name
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
Timer B2 count start flag
Timer B1 count start flag
Timer B0 count start flag
Timer A4 count start flag
Timer A3 count start flag
Timer A2 count start flag
Timer A1 count start flag
Timer A0 count start flag
0 : Stops counting
1 : Starts counting
TB2S
TB1S
TB0S
TA4S
TA3S
TA2S
TA1S
TA0S
Function
Symbol
Address
When reset
TB0
039116, 039016
Indeterminate
TB1
039316, 039216
Indeterminate
TB2
039516, 039416
Indeterminate
b7
b0 b7
b0
(b15)
(b8)
Timer Bi register (Note)
W
R
Timer mode
000016 to FFFF16
Counts the timer's period
Function
Note: Read and write data in 16-bit units.
Values that can be set
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