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參數(shù)資料
| 型號(hào)： | M34559G6 |
| 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(yè)數(shù)： | 68/148頁(yè) |
| 文件大?。?/td> | 1732K |
| 代理商： | M34559G6 |
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Rev.1.04
REJ03B0188-0104
Aug 23, 2007
Page 68 of 146
4559 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.
CNV
SS
is also used as V
PP
pin. Accordingly, when using this pin,
connect this pin to V
SS
through a resistor about 5k
(connect
this resistor to CNV
SS
/V
PP
pin as close as possible).
(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/output of D
5
can be used even when INT is used. Be
careful when using inputs of both INT and D
5
since the input
threshold value of INT pin is different from that of port D
5
.
“H“ output function of port C can be used even when the
CNTR (output) is used.
(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, POF2 instruction
When the POF or POF2 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 or POF2 instruction.
Be sure to disable interrupts by executing the DI instruction
before executing the EPOF instruction and the POF/POF2
instruction continuously.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34559G6FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34559G6-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AG8FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AG8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M3455AGCFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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