參數資料
型號: M30201M2-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP56
封裝: PLASTIC, QFP-56
文件頁數: 103/158頁
文件大?。?/td> 1633K
代理商: M30201M2-XXXFP
49
Under
development
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer A
Timer A
Figure 1.37 shows the block diagram of timer A. Figures 1.38 to 1.40 show the timer A-related registers.
Use the timer A0 mode register bits 0 and 1 to choose the desired mode.
Timer A has the four operation modes listed as follows:
Timer mode: The timer counts an internal count source.
Event counter mode: The timer counts pulses from an external source or a timer over flow.
One-shot timer mode: The timer stops counting when the count reaches “000016”.
Pulse width modulation (PWM) mode: The timer outputs pulses of a given width.
Figure 1.38. Timer A-related registers (1)
Figure 1.37. Block diagram of timer A
Count start flag
Up count/down count
Always down count except
in event counter mode
Reload register (16)
Counter (16)
Low-order
8 bits
High-order
8 bits
Clock source
selection
Timer
(gate function)
Timer
One shot
PWM
f1
f8
f32
External
trigger
TA0IN
TB1 overflow
Event counter
fC32
Clock selection
TX0 overflow
Pulse output
Toggle flip-flop
TA0OUT
Data bus low-order bits
Data bus high-order bits
Up/down flag
Down count
TX2 overflow
Polarity
selection
Timer A0 mode register
Symbol
Address
When reset
TA0MR
039616
0016
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4 b3
b2
b1
b0
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
b1 b0
TCK1
MR3
MR2
MR1
TMOD1
MR0
TMOD0
TCK0
Function varies with each operation mode
Count source select bit
(Function varies with each operation mode)
Operation mode select bit
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