參數(shù)資料
型號： M30218MC-XXXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 139/161頁
文件大?。?/td> 2043K
代理商： M30218MC-XXXXFP
79
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
TimerA
(4) Pulse width modulation (PWM) mode
In this mode, the timer outputs pulses of a given width in succession. (See Table FB-5.) In this mode, the counter
functions as either a 16-bit pulse width modulator or an 8-bit pulse width modulator. Figure FB-10 shows the
timer Ai mode register in pulse width modulation mode. Figure FB-11 shows the example of how a 16-bit pulse
width modulator operates. Figure FB-12 shows the example of how an 8-bit pulse width modulator operates.
Table FB-5. Timer specifications in pulse width modulation mode
Figure FB-10. Timer Ai mode register in pulse width modulation mode
Item
Specification
Count source
f1, f8, f32, fC32
Count operation
The timer counts down (operating as an 8-bit or a 16-bit pulse width modulator)
The timer reloads a new count at a rising edge of PWM pulse and continues counting
The timer is not affected by a trigger that occurs when counting
16-bit PWM
High level width
n / fi
n : Set value
Cycle time
(216-1) / fi fixed
8-bit PWM
High level width
n X (m+1) / fi
n : values set to timer Ai register’s high-order address
Cycle time
(28-1) X (m+1) / fi
m : values set to timer Ai register’s low-order address
Count start condition
External trigger is input
The timer overflows
The count start flag is set (= 1)
Count stop condition
The count start flag is reset (= 0)
Interrupt request generation timing
PWM pulse goes “L”
TAiIN pin function
Programmable I/O port or trigger input
TAiOUT pin function
Pulse output
Read from timer
When timer Ai register is read, it indicates an indeterminate value
Write to timer
When counting stopped
When a value is written to timer Ai register, it is written to both reload
register and counter
When counting in progress
When a value is written to timer Ai register, it is written to only reload register
(Transferred to counter at next reload time)
Timer Ai mode register
SymbolAddressWhen reset
TAiMR(i=0 to 4)039616 to 039A16
0016
Bit nameFunction
Bit symbol
b7
b6b5b4b3
b2b1b0
Operation mode
select bit
1 1 : PWM mode
b1 b0
TMOD1
TMOD0
MR0
MR2
MR1
MR3
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : fC32
b7 b6
TCK1
TCK0
Count source select bit
W
R
11
1
1 (Must always be fixed to “1” in PWM mode)
16/8-bit PWM mode
select bit
0: Functions as a 16-bit pulse width modulator
1: Functions as an 8-bit pulse width modulator
Trigger select bit
External trigger select
bit (Note 1)
0: Falling edge of TAiIN pin's input signal (Note 2)
1: Rising edge of TAiIN pin's input signal (Note 2)
0: Count start flag is valid
1: Selected by event/trigger select register
Note 1: Valid only when the TAiIN pin is selected by the event/trigger select bit
(addresses 038216 and 038316). If timer overflow is selected, this bit can be “1” or “0
Note 2: Set the corresponding port direction register to “0”.
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