參數(shù)資料
型號: M30201F2-FP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP56
封裝: PLASTIC, QFP-56
文件頁數(shù): 114/158頁
文件大?。?/td> 1633K
代理商: M30201F2-FP
59
Under
development
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer B
Timer B
Figure 1.48 shows the block diagram of timer B. Figures 1.49 and 1.50 show the timer B-related registers.
Use the timer Bi mode register (i = 0, 1) bits 0 and 1 to choose the desired mode.
Timer B has three 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 overflow.
Pulse period/pulse width measuring mode
: The timer measures an external signal's pulse period or
pulse width.
Figure 1.48. Block diagram of timer B
Timer Bi mode register
Symbol
Address
When reset
TBiMR(i = 0, 1)
039B16, 039C16
00XX00002
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 : Pulse period/pulse width
measurement mode
1 1 : Inhibited
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
(Note 1)
(Note 2)
Note 1: Timer B0.
Note 2: Timer B1.
Note 3: Must set “00” to operation mode select bit of M30200.
Clock source selection
Event counter
Timer
Pulse period/pulse width measurement
Reload register (16)
Low-order 8 bits
High-order 8 bits
Data bus low-order bits
Data bus high-order bits
f1
f8
f32
TBj overflow
(j = 1 when i = 0,
j = 0 when i = 1)
Can be selected in only
event counter mode
Count start flag
fC32
Polarity switching
and edge pulse
TBiIN
(i = 0, 1)
Counter reset circuit
Counter (16)
Figure 1.49. Timer B-related registers (1)
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