參數(shù)資料
型號： M30218MFCFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 142/161頁
文件大?。?/td> 2043K
代理商： M30218MFCFP
81
Under
development
Tentative Specifications REV.A
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
TimerB
Timer B
Figure TA-1 shows the block diagram of timer B. Figures TA-2 and TA-3 show the timer B-related registers.
Use the timer Bi mode register (i = 0 to 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 TA-1. Block diagram of timer B
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,
j = 2 when i = 0)
Can be selected in only
event counter mode
Count start flag
fc32
Polarity switching
and edge pulse
(i = 0 to 2)
Counter reset circuit
Counter (16)
TBi
Address
TBj
Timer B0
039116 039016
Timer B2
Timer B1
039316 039216
Timer B0
Timer B2
039516 039416
Timer B1
TBiIN
Timer Bi mode register
SymbolAddressWhen reset
TBiMR(i = 0 to 2)039B16 to 039D16
00XX00002
Bit symbol
Bit name
Function
W
R
b7b6b5b4b3b2b1b0
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, timer B2.
Figure TA-2. Timer B-related registers (1)
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