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參數(shù)資料
| 型號： | M34507M2-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, MICROCONTROLLER, PDSO24 |
| 封裝： | 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 176/216頁 |
| 文件大?。?/td> | 3262K |
| 代理商： | M34507M2-XXXFP |
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1-50
Rev.2.01
Feb 04, 2005
4507 Group
HARDWARE
REJ09B0195-0201
Fig. 51 Analog input external circuit example-1
Fig. 52 Analog input external circuit example-2
Notes for the use of A/D conversion 2
Do not change the operating mode (both A/D conversion mode
and comparator mode) of A/D converter with the bit 3 of register
Q1 while the A/D converter is operating.
When the operating mode of A/D converter is changed from the
comparator mode to A/D conversion mode with the bit 3 of regis-
ter Q1, note the following;
Clear the bit 2 of register V2 to “0” (refer to Figure 50) to
change the operating mode of the A/D converter from the com-
parator mode to A/D conversion mode with the bit 3 of register
Q1.
The A/D conversion completion flag (ADF) may be set when the
operating mode of the A/D converter is changed from the com-
parator mode to the A/D conversion mode. Accordingly, set a
value to the bit 3 of register Q1, and execute the SNZAD instruc-
tion to clear the ADF flag.
LA
8
; (02)
TV2A
; The SNZAD instruction is valid ........
LA
0
; (02)
TQ1A
; Operation mode of A/D converter is
changed from comparator mode to A/D
conversion mode.
SNZAD
NOP
: this bit is not related to change the operation
mode of A/D converter.
Fig. 50 External 0 interrupt program example-3
Notes for the use of A/D conversion 3
Each analog input pin is equipped with a capacitor which is used
to compare the analog voltage. Accordingly, when the analog
voltage is input from the circuit with high-impedance and, charge/
discharge noise is generated and the sufficient A/D accuracy
may not be obtained. Therefore, reduce the impedance or, con-
nect a capacitor (0.01
F to 1 F) to analog input pins (Figure
51).
When the overvoltage applied to the A/D conversion circuit may
occur, connect an external circuit in order to keep the voltage
within the rated range as shown the Figure 52. In addition, test
the application products sufficiently.
Sensor
AIN
Apply the voltage withiin the specifications
to an analog input pin.
Sensor
AIN
About 1k
LIST OF PRECAUTIONS
Electric Characteristic Differences Between Mask ROM and One
Time PROM Version MCU
There are differences in electric characteristics, operation margin, noise
immunity, and noise radiation between Mask ROM and One Time PROM
version MCUs due to the difference in the manufacturing processes.
When manufacturing an application system with the One time
PROM version and then switching to use of the Mask ROM ver-
sion, please perform sufficient evaluations for the commercial
samples of the Mask ROM version.
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.
Notes for the use of A/D conversion 1
Note the following when using the analog input pins also for ports
P2 and P3 functions:
Selection of analog input pins
Even when P20/AIN0, P21/AIN1, P30/AIN2, P31/AIN3 are set to pins
for analog input, they continue to function as ports P2 and P3 in-
put/output. Accordingly, when any of them are used as I/O port
and others are used as analog input pins, make sure to set the
outputs of pins that are set for analog input to “1.” Also, the port
input function of the pin functions as an analog input is unde-
fined.
TALA instruction
When the TALA instruction is executed, the low-order 2 bits of
register AD is transferred to the high-order 2 bits of register A, si-
multaneously, the low-order 2 bits of register A is “0.”
21
20
19
22
23
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34507M4-XXXFP | 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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| M34508G4GP#U0 | 功能描述:MCU 2/5V 4096 QZROM PB-FREE 20-S RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:720/4500 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設(shè)備:DMA，LVD，POR，PWM，WDT 輸入/輸出數(shù):27 程序存儲器容量:16KB（16K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤 |
| M34508G4GP(#UO) | 制造商:Renesas Electronics Corporation 功能描述: |
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