參數(shù)資料
型號(hào)： 38D5
廠(chǎng)商： Renesas Technology Corp.
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)： 62/141頁(yè)
文件大?。?/td> 2027K
代理商： 38D5
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)當(dāng)前第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)
Rev.3.01
REJ03B0158-0301
Aug 08, 2007
Page 62 of 134
38D5 Group
CLOCK GENERATING CIRCUIT
The oscillation circuit of 38D5 Group can be formed by
connecting an oscillator, capacitor and resistor between X
IN
and
X
OUT
(X
CIN
and X
COUT
). To supply a clock signal externally,
input it to the X
IN
pin and make the X
OUT
pin open. The clocks
that are externally generated cannot be directly input to X
CIN
.
Use the circuit constants in accordance with the oscillator
manufacturer's recommended values. No external resistor is
needed between X
IN
and X
OUT
since a feed-back resistor exists
on-chip. (An external feed-back resistor may be needed
depending on conditions.) However, an about 10 M
external
feedback resistor is needed between X
CIN
and X
COUT
.
The 38D5 Group operation mode immediately after reset
depends on the OSCSEL pin state in the QzROM version.
When the OSCSEL pin state is GND level, the only on-chip
oscillator starts oscillating. The X
IN
-X
OUT
oscillation stops
oscillating, and X
CIN
and X
COUT
pins function as I/O ports.
Flash memory version as same.
When the OSCSEL pin state is V
CC
level, the X
IN
-X
OUT
oscillation divided by 8 starts oscillating. The on-chip oscillator
stops oscillating, and the X
CIN
and X
COUT
pins function as I/O
ports.
Note the following in each mode.
X
IN
Mode
The X
IN
-X
OUT
oscillation does not stop even if the X
IN
-X
OUT
oscillation stop bit is set to “1”.
Low-Speed Mode
The X
CIN
-X
COUT
oscillation stops if the port X
C
switch bit is set
to “0”.
On-Chip Oscillator Mode
Even if the on-chip oscillator stop bit is set to “1”, the on-chip
oscillator oscillation does not stop in the flash memory version,
but stops in the QzROM version.
Frequency Control
(1) On-chip oscillation mode
The system clock
φ
is the on-chip oscillator oscillation divided
by 32.
(2) X
IN
mode
Frequency/2 mode, frequency /4 mode, and frequency/8 mode
are collectively referred as X
IN
mode.
- Frequency/8 Mode
The system clock
φ
is the frequency of X
IN
divided by 8.
- Frequency/4 Mode
The system clock
φ
is the frequency of X
IN
divided by 4.
- Frequency/2 Mode
The system clock
φ
is half the frequency of X
IN
.
(3)Low-speed Mode
The system clock
φ
is half the frequency of sub clock.
After reset and when system returns from the stop mode, the
operation mode depends on the OSCSEL pin state in the
QzROM version and the flash memory version operation mode is
the on-chip oscillator mode.
When the RESET pin changes from “L” to “H” and when the
STP instruction is executed, determine the input level applied to
the OSCSEL pin.
Refer to the clock state transition diagram for the setting of
transition to each mode.
The X
IN
-
OUT
oscillation is controlled by the bit 5 of CPUM, and
the sub-clock oscillation is controlled by the bit 4 of CPUM and
the on-chip oscillator oscillation is controlled by the bit 0 of
CPUM2.
In the on-chip oscillator mode, the oscillation by the oscillator
can be stopped. In the low-speed mode, the power consumption
can be reduced by stopping the X
IN
X
OUT
oscillation.
In low-speed mode, the on-chip oscillator stops in the QzROM
version regardless of the on-chip oscillator stop bit value. The
on-chip oscillator does not stop in the flash memory version, so
set the on-chip oscillator stop bit to “1” to stop the oscillation.
Set enough time for oscillation to stabilize by programming to
restart the stopped oscillation and switch the operation mode.
Also, set enough time for oscillation to stabilize by programming
to switch the timer count source.
<Notes on Clock Generating Circuit>
If you switch the mode between on-chip oscillator mode, X
IN
mode and low-speed mode, stabilize both X
IN
and X
CIN
oscillations. Especially be careful immediately after power-on
and at returning from stop mode. Refer to the clock state
transition diagram for the setting of transition to each mode. Set
the frequency in the condition that f(X
IN
) > 3
f(X
CIN
).
When the X
IN
mode is not used (X
IN
-X
OUT
oscillation and
external clock input are not performed), connect X
IN
to V
CC
through a resistor.
相關(guān)PDF資料
PDF描述
38F1222 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
TA5M STECKER DIN MINI 5POL
70B5031 KUPPLUNG DIN MINI 5POL
39-26-3050 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
390KD05JX 11 to 460 Volts Varistor 0.7 to 29 Joule
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
38D5_07 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:Standard Characteristics Example
38D5_08 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
38D511G015FE6AD 制造商:Sprague/Vishay 功能描述:AL015X751
38D5-FMV 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:Standard Characteristics (Flash Memory Version)
38DDP11B11M1QT 功能描述:SWITCH PUSH DPDT,O-N-O,N,SL,LF , 制造商:grayhill inc. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*