參數(shù)資料
型號(hào)： M38C24M6-XXXFP
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)： 44/63頁(yè)
文件大?。?/td> 1000K
代理商： M38C24M6-XXXFP
44
38C2 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
WATCHDOG TIMER
The watchdog timer gives a mean of returning to the reset status
when a program cannot run on a normal loop (for example, because
of a software run-away). The watchdog timer consists of an 8-bit
counter.
Initial Value of Watchdog Timer
At reset or writing to the watchdog timer control register, each watch-
dog timer is set to
“
FF
16
.
”
Instructions such as STA, LDM and CLB to
generate the write signals can be used.
The written data in bits 0 to 5 are not valid, and the above values are
set.
Standard Operation of Watchdog Timer
The watchdog timer is in the stop state at reset and the watchdog
timer starts to count down by writing an optional value in the watch-
dog timer control register. An internal reset occurs at an underflow of
the watchdog timer. Then, reset is released after the reset release
time is elapsed, the program starts from the reset vector address.
Normally, writing to the watchdog timer control register before an
underflow of the watchdog timer is programmed. If writing to the watch-
dog control register is not executed, the watchdog timer does not
operate.
Fig. 44 Timing diagram of reset output
When reading the watchdog timer control register is executed, the
contents of the high-order 6-bit counter and the STP instruction dis-
able bit (bit 6), and the count source selection bit (bit 7) are read out.
When the STP instruction disable bit is
“
0
”
, the STP instruction is
valid. The STP instruction is disabled by writing to
“
1
”
to this bit. In
this time, when the STP instruction is executed, it is handled as the
undefined instruction, the internal reset occurs. This bit cannot be
cleared to
“
0
”
by program. This bit is
“
0
”
after reset.
The time until the underflow of the watchdog timer control register
after writing to the watchdog timer control register is executed is as
follows (when the bit 7 of the watchdog timer control register is
“
0
”
) ;
at through, frequency/2/4/8 mode (f(X
IN
)) = 8 MHz): 32.768 ms
at low-speed mode (f(X
CIN
) = 32 KHz): 8.19s
I
Note
The watchdog timer continues to count even during the wait time set
by timer 1 and timer 2 to release the stop state and in the wait mode.
Accordingly, do not underflow the watchdog timer in this time.
Fig. 42 Block diagram of Watchdog timer
Fig. 43 Structure of Watchdog timer control register
b0
STP instruction disable bit
0: STP instruction enabled
1: STP instruction disabled
Watchdog timer count source selection bit
0: 1/1024 of system clock
1: 1/4 of system clock
Watchdog timer H (for read-out of high-order 6 bit)
“
FF
16
”
is set to watchdog timer by writing to these bits.
Watchdog timer control register
(WDTCON : address 0037
16
)
b7
I
s
n
i
t
g
e
n
r
n
a
a
l
l
r
e
s
e
t
Watchdog timer detected
≈
32
msec
(at f(X
IN
)=8MH
Z
)
f
(
X
I
N
)
X
IN
X
C
I
N
Sy
b
i
s
(
t
b
e
m
t
c
)
l
o
c
k
c
o
n
t
r
o
“
0
”
l
t
i
6
1/1024
U
n
d
e
f
i
n
e
d
i
n
s
t
r
u
R
c
e
t
i
s
o
e
n
t
R
E
S
E
T
I
N
Wait until reset release
1
/
4
D
a
t
a
b
u
s
W
c
s
“
0
”
a
u
l
e
t
n
c
h
t
t
d
s
i
o
o
o
n
g
u
t
c
i
i
e
t
m
e
r
H
o
e
r
b
c
R
c
e
i
r
s
c
e
u
t
t
i
S
T
P
i
n
s
t
r
u
c
S
t
i
o
n
P
d
i
n
i
s
s
a
t
r
b
u
l
c
e
t
i
b
o
i
n
t
Watchdog timer
H (6)
Internal reset
T
Watchdog timer
L (2)
“
F
w
c
w
F
1
a
t
o
n
r
i
6
”
h
r
o
e
d
l
n
i
s
o
r
t
g
e
o
s
e
t
g
.
t
m
s
w
e
t
e
h
r
r
e
i
n
c
t
t
i
i
s
t
“
1
”
“
1
”
相關(guān)PDF資料
PDF描述
M38C24M6-XXXHP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38C29FFFP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38C29FFHP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38C29MC-XXXFP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38C29MC-XXXHP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38C24M6-XXXHP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38C29FFAFP 制造商:Renesas Electronics Corporation 功能描述:
M38C29FFAFP#U0 功能描述:IC 740/38C2 MCU FLASH 64LQFP 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
M38C29FFAHP 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 60K 64-LQFP - Trays
M38C29FFAHP#U0 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 60KB FLASH 5V 64LQFP - Trays
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