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參數(shù)資料
| 型號(hào)： | M38507E8FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 20/86頁(yè) |
| 文件大?。?/td> | 1193K |
| 代理商： | M38507E8FP |
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20
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
TIMERS
The 3850 group (spec. H) has four timers: timer X, timer Y, timer
1, and timer 2.
The division ratio of each timer or prescaler is given by 1/(n + 1),
where n is the value in the corresponding timer or prescaler latch.
All timers are count down. When the timer reaches
“
00
16
”
, an un-
derflow occurs at the next count pulse and the corresponding
timer latch is reloaded into the timer and the count is continued.
When a timer underflows, the interrupt request bit corresponding
to that timer is set to
“
1
”
.
Timer 1 and Timer 2
The count source of prescaler 12 is the oscillation frequency
which is selected by timer 12 count source selection bit. The out-
put of prescaler 12 is counted by timer 1 and timer 2, and a timer
underflow sets the interrupt request bit.
Timer X and Timer Y
Timer X and Timer Y can each select in one of four operating
modes by setting the timer XY mode register.
(1) Timer Mode
The timer counts the count source selected by Timer count source
selection bit.
(2) Pulse Output Mode
The timer counts the count source selected by Timer count source
selection bit. Whenever the contents of the timer reach
“
00
16
”
, the
signal output from the CNTR
0
(or CNTR
1
) pin is inverted. If the
CNTR
0
(or CNTR
1
) active edge selection bit is
“
0
”
, output begins
at
“
H
”
.
If it is
“
1
”
, output starts at
“
L
”
. When using a timer in this mode, set
the corresponding port P2
7
( or port P4
0
) direction register to out-
put mode.
(3) Event Counter Mode
Operation in event counter mode is the same as in timer mode,
except that the timer counts signals input through the CNTR
0
or
CNTR
1
pin.
When the CNTR
0
(or CNTR
1
) active edge selection bit is
“
0
”
, the
rising edge of the CNTR
0
(or CNTR
1
) pin is counted.
When the CNTR
0
(or CNTR
1
) active edge selection bit is
“
1
”
, the
falling edge of the CNTR
0
(or CNTR
1
) pin is counted.
(4) Pulse Width Measurement Mode
If the CNTR
0
(or CNTR
1
) active edge selection bit is
“
0
”
, the timer
counts the selected signals by the count source selection bit while
the CNTR
0
(or CNTR
1
) pin is at
“
H
”
. If the CNTR
0
(or CNTR
1
) ac-
tive edge selection bit is
“
1
”
, the timer counts it while the CNTR
0
(or CNTR
1
) pin is at
“
L
”
.
The count can be stopped by setting
“
1
”
to the timer X (or timer Y)
count stop bit in any mode. The corresponding interrupt request
bit is set each time a timer underflows.
Fig. 15 Structure of timer XY mode register
I
Note
When switching the count source by the timer 12, X and Y count
source bit, the value of timer count is altered in unconsiderable
amount owing to generating of a thin pulses in the count input
signals.
Therefore, select the timer count source before set the value to
the prescaler and the timer.
Fig. 16 Structure of timer count source selection register
Timer X count stop bit
0: Count start
1: Count stop
T
(
i
b
i
T
1
m
M
e
r
a
X
d
Y
d
r
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e
o
s
d
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e
0
0
r
e
2
g
3
1
i
s
6
)
t
e
r
:
Timer Y operating mode bits
b
4
0b
0 1: Pulse output mode
1 1: Pulse width measurement mode
CNTR
active edge selection bit
0: Interrupt at falling edge
Count at rising edge in event
counter mode
1: Interrupt at rising edge
Count at falling edge in event
counter mode
Timer Y count stop bit
0: Count start
1: Count stop
b
7
CNTR
0
active edge selection bit
0: Interrupt at falling edge
Count at rising edge in event
counter mode
1: Interrupt at rising edge
Count at falling edge in event
counter mode
b
0
T
m
b
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1
0
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0
1
:
:
:
:
T
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P
i
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(
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r
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c
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:
u
a
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r
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u
s
r
c
0
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0
s
2
e
8
1
l
e
6
)
c
t
i
o
n
r
e
g
i
s
t
e
r
s
b
7
b0
T
m
:
:
e
f
(
f
(
r
X
I
X
I
X
N
)
N
)
c
/
/
o
1
2
u
6
(
n
(
f
t
f
X
C
(
s
X
C
o
u
I
N
)
r
N
)
/
c
e
/
2
s
6
a
e
t
l
e
t
o
c
l
w
t
i
o
w
s
n
-
p
b
p
i
e
d
t
1
a
l
o
-
s
e
e
m
d
o
m
d
o
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d
)
e
)
(
I
T
m
:
:
e
f
(
f
(
r
X
I
X
I
Y
N
)
N
)
c
/
/
o
1
2
u
6
(
n
(
f
t
f
X
C
(
s
X
C
o
u
I
N
)
r
N
)
/
c
e
/
2
s
6
a
e
t
l
e
t
o
c
l
w
t
i
o
w
s
n
-
p
b
p
i
e
d
t
1
a
l
o
-
s
e
e
m
d
o
m
d
o
e
d
)
e
)
(
I
0 : f(X
IN
)/)
CIN
)/16 at low-speed mode)
1 : f(X
CIN
Not used (returns
“
0
”
when read)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38507F8AFP#U1 | 功能描述:IC 740/3850 MCU FLASH 42SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產(chǎn)品培訓(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標(biāo)準(zhǔn)包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲(chǔ)器容量:384KB（384K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁(yè)面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M38507F8AFP#W1 | 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 32K PB-FREE 42-SSOP T&R - Tape and Reel |
| M38507F8FP | 制造商:Renesas Electronics Corporation 功能描述:MCU 8-Bit 740 CISC 32KB Flash 5V 42-Pin SSOP 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 32KB FLASH 5V 42SSOP - Trays |
| M38507F8FP#U1 | 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 32KB FLASH 5V 42SSOP - Trays |
| M38507F8FP#W1 | 制造商:Renesas Electronics Corporation 功能描述:FLASH 8-BIT 2.7 TO 5.5V PBFREE |
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