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| 型號(hào)： | M30220 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單片16位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 77/212頁(yè) |
| 文件大?。?/td> | 2891K |
| 代理商： | M30220 |
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Timer A
Unde
deeopmen
Preliminary Specifications REV.E
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
77
(4) Pulse width modulation (PWM) mode
In this mode, the timer outputs pulses of a given width in succession. (See Table 1.13.5.) In this mode, the
counter functions as either a 16-bit pulse width modulator or an 8-bit pulse width modulator. Figure
1.13.13 shows the timer Ai mode register in pulse width modulation mode. Figure 1.13.14 shows the
example of how a 16-bit pulse width modulator operates. Figure 1.13.15 shows the example of how an 8-
bit pulse width modulator operates.
Figure 1.13.13. Timer Ai mode register in pulse width modulation mode
Table 1.13.5. Timer specifications in pulse width modulation mode
Item
Specification
Count source
Count operation
f
1
, f
8
, f
32
, f
C132
T
he 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
High level width
n / fi
n : Set value
Cycle time
(2
16
-1) / fi fixed
High level width
n (m+1) / fi
n : values set to timer Ai register’s high-order address
Cycle time
(2
8
-
1) (m+1) / fi
m : values set to timer Ai register’s low-order address
External trigger is input
The timer overflows
The count start flag is set (= 1)
The count start flag is reset (= 0)
PWM pulse goes “L”
Programmable I/O port or trigger input
Pulse output
When timer Ai register is read, it indicates an indeterminate value
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)
16-bit PWM
8-bit PWM
Count start condition
Count stop condition
Interrupt request generation timing
TAi
IN
pin function
TAi
OUT
pin function
Read from timer
Write to timer
Bit name
Timer Ai mode register
Symbol
TAiMR(i=0 to 4)
TAiMR(i=5 to 7)
Address
When reset
00
16
00
16
0396
16
to 039A
16
0356
16
to 0358
16
Function
Bit symbol
TMOD0
b7
b6
b5
b4
b3
b2
1
b1
1
b0
1
Operation mode
select bit
1 1 : PWM mode
b1 b0
TMOD1
MR0
MR2
MR1
MR3
0 0 : f
1
0 1 : f
8
1 0 : f
32
1 1 : f
C132
b7 b6
TCK1
TCK0
Count source select bit
1 (Must always be “1” in PWM mode)
External trigger select
bit (Note 1)
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
0: Falling edge of TAi
IN
pin's input signal (Note 2)
1: Rising edge of TAi
IN
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 TA
iIN
pin is selected by the event/trigger select bit
(addresses 0342
16
, 0343
16
, 0382
16
and 0383
16
). If timer overflow is selected,
this bit can be “1” or “0”.
Note 2: Set the corresponding port direction register to “0” (input mode).
AA
AA
A
AA
AA
AA
A
A
A
A
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| M30220FC | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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相關(guān)代理商/技術(shù)參數(shù) |
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| M30220F8-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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| M30220FA-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30220FA-XXXRP | 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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