參數(shù)資料
型號： M30302M8L-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, PLASTIC, QFP-100
文件頁數(shù)： 152/165頁
文件大?。?/td> 2188K
代理商： M30302M8L-XXXFP
Timer B
87
Mitsubishi microcomputers
M16C / 30L Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer B
Figure 1.14.14 shows the block diagram of timer B. Figures 1.14.15 and 1.14.16 show the timer B-related
registers.
Use the timer Bi mode register (i = 1, 2) 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 1.14.14. Block diagram of timer B
Timer Bi mode register
Symbol
Address
When reset
TBiMR(i = 1, 2)
039C16, 039D16
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 : Must not be set.
b1 b0
TCK1
MR3
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
Function varies with each operation mode
Nothing is assigned.
In an attempt to write to these bits, write “0”.
The value, if read, turns out to be indeterminate.
Clock source selection
(address 038016)
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 = i – 1. Note, however,
must not be set when i = 1)
Can be selected in only
event counter mode
Count start flag
fC32
Polarity switching
and edge pulse
TBiIN
(i = 1, 2)
Counter reset circuit
Counter (16)
TBi
Address
TBj
Timer B1
039316 039216
Must not be set
Timer B2
039516 039416
Timer B1
Clock selection
Figure 1.14.15. Timer B-related registers (1)
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參數(shù)描述
M30302M8L-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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