參數(shù)資料
型號(hào)： M34571G4
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機(jī)的CMOS
文件頁數(shù)： 55/126頁
文件大小： 1627K
代理商： M34571G4
Rev.1.02
REJ03B0179-0102
May 25, 2007
Page 55 of 124
4571 Group
LIST OF PRECAUTIONS
(1) Noise and latch-up prevention
Connect a capacitor on the following condition to prevent noise
and latch-up;
connect a bypass capacitor (approx. 0.1
μ
F) between pins V
DD
and V
SS
at the shortest distance,
equalize its wiring in width and length, and
use relatively thick wire.
Port K is also used as V
PP
pin. Accordingly, when using this pin,
connect this pin to V
SS
or V
DD
. Do not leave this pin open. When
port is used for key matrix, connect it to V
DD
through a pull-up
resistor.
(2) Note on Power Source Voltage
When the power source voltage value of a microcomputer is less
than the value which is indicated as the recommended operating
conditions, the microcomputer does not operate normally and
may perform unstable operation.
In a system where the power source voltage drops slowly when
the power source voltage drops or the power supply is turned off,
reset a microcomputer when the supply voltage is less than the
recommended operating conditions and design a system not to
cause errors to the system by this unstable operation.
(3) Register initial values 1
The initial value of the following registers are undefined after
system is released from reset. After system is released from reset,
set initial values.
Register Z (2 bits)
Register D (3 bits)
Register E (8 bits)
(4) Register initial values 2
The initial value of the following registers are undefined at RAM
back-up. After system is returned from RAM back-up, set initial
values.
Register Z (2 bits)
Register X (4 bits)
Register Y (4 bits)
Register D (3 bits)
Register E (8 bits)
(5) Program counter
Make sure that the PC
H
does not specify after the last page of the
built-in ROM.
(6) Stack registers (SKS)
Stack registers (SKs) are eight identical registers, so that
subroutines can be nested up to 8 levels. However, one of stack
registers is used respectively when using an interrupt service
routine and when executing a table reference instruction.
Accordingly, be careful not to over the stack when performing
these operations together.
(7) Multifunction
The input of D
4
can be used even when CNTR0 (output) is
selected. The input/output of D
4
can be used even when
CNTR0 (input) is selected. Be careful when using inputs of
both CNTR0 and D
4
since the input threshold value of CNTR0
pin is different from that of port D
4
.
“H” output function of port C can be used even when the
CNTR1 (output) is used.
The input/output of P2
0
can be used even when INT0 is used.
Be careful when using inputs of both INT0 and P2
0
since the
input threshold value of INT0 pin is different from that of port
P2
0
.
The input/output of P2
1
can be used even when INT1 is used.
Be careful when using inputs of both INT1 and P2
1
since the
input threshold value of INT1 pin is different from that of port
P2
1
.
(8) Power-on reset
When the built-in power-on reset circuit is used, set the time for
the supply voltage to rise from 0 V to the minimum voltage of
recommended operating conditions to 100
μ
s or less.
If the rising time exceeds 100
μ
s, connect a capacitor between
the RESET pin and Vss at the shortest distance, and input “L”
level to RESET pin until the value of supply voltage reaches the
minimum operating voltage.
(9) POF instruction
When the POF instruction is executed continuously after the
EPOF instruction, system enters the RAM back-up state.
Note that system cannot enter the RAM back-up state when
executing only the POF instruction.
Be sure to disable interrupts by executing the DI instruction
before executing the EPOF instruction and the POF instruction
continuously.
相關(guān)PDF資料
PDF描述
M3488Q1 256 x 256 DIGITAL SWITCHING MATRIX
M3488 256 x 256 DIGITAL SWITCHING MATRIX
M3488B1 256 x 256 DIGITAL SWITCHING MATRIX
M3493B2 CMOS 12 X 8 CROSSPOINTWITH CONTROL MEMORY
M3493B1 CMOS 12 X 8 CROSSPOINTWITH CONTROL MEMORY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34571G4FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34571G4-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34571G6 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34571G6FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34571G6-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*