参数资料
型号: M30240M5-XXXFP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
封装: 0.80 MM PITCH, PLASTIC, QFP-80
文件页数: 113/139页
文件大小: 1453K
代理商: M30240M5-XXXFP
75
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Specifications REV. G
Specifications in this manual are tentative and subject to change
Timer A
Figure 1.68: Timer Ai mode register in pulse-width modulation mode
Figure 1.69: Example of how an 8-bit pulse-width modulator operates
Note 1: Valid only when the TAi IN pin is selected by the event/trigger select bit.
(addresses 0382 16 and 038316). If timer overflow is selected, this bit can be "1", or "0".
Note 2: Set the corresponding port direction register to “0”.
Timer Ai mode register
Symbol
Address
When reset
TAiMR(i=0 to 4)
039616 to 039A16
0016
Bit name
Function
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
Operation mode
select bit
1 1 : PWM mode
b1 b0
TMOD1
TMOD0
MR0
External trigger select bit
(Note 1)
0 : Falling edge of TAi IN pin's input signal
(Note 2)
1 : Rising edge of TAi IN pin's input signal
(Note 2)
MR2
MR1
MR3
Must always be "1" in PWM mode)
0 0 : f 1
0 1 : f 8
1 0 : f 32
1 1 : Reserved
b7 b6
TCK1
TCK0
Count source select bit
11
1
W
R
Trigger select bit
0 : Functions as a 16-bit pulse width modulator
1 : Functions as an 8-bit pulse width modulator
16/8 PWM mode select bit
0 : Count start flag is valid
1 : Selected by event /trigger select register
Count source (Note1)
TA iIN pin input signal
Underflow signal of
8-bit prescaler (Note 2)
PWM pulse output
from TA iOUT pin
“H”
“L”
“1”
“0”
Timer Ai interrupt
request bit
Cleared to “0” when interrupt request is accepted, or cleared by software
fi : Frequency of count source
(f1, f8, f32)
Note 1: The 8-bit prescaler counts the count source.
Note 2: The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal.
Condition :
Reload register high-order 8 bits = 0216
Reload register low-order 8 bits = 0216
External trigger (falling edge of TAiIN pin input signal) is selected
1 / fi X (m + 1) X (2 – 1)
8
1 / fi X (m + 1) X n
1 / fi X (m + 1)
Note 3: m = 0016 to FE16; n = 0016 to FE16
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