參數(shù)資料
型號(hào): M34507M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 4.4 MHz, MICROCONTROLLER, PDSO24
封裝: 0.300 INCH, PLASTIC, SSOP-24
文件頁(yè)數(shù): 114/217頁(yè)
文件大小: 3518K
代理商: M34507M4-XXXFP
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4507 Group User’s Manual
APPENDIX
3-33
3.3 List of precautions
3.3.1 Program counter
Make sure that the PCH does not specify after the last page of the built-in ROM.
3.3.2 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.
3.3.3 Notes on I/O port
(1)
Note when an I/O port is used as an input port
Set the output latch to “1” and input the port value before input. If the output latch is set to “0,” “L”
level can be input.
(2)
Noise and latch-up prevention
Connect an approximate 0.1
F bypass capacitor directly to the VSS line and the VDD line with the
thickest possible wire at the shortest distance, and equalize its wiring in width and length.
The CNVSS pin is also used as the VPP pin (programming voltage = 12.5 V) at the One Time PROM
version.
Connect the CNVSS/VPP pin to VSS through an approximate 5 k
resistor which is connected to the
CNVSS/VPP pin at the shortest distance.
(3)
Note on multifunction
The input/output of D2, D3, P12 and P13 can be used even when C, K, CNTR (input) and INT are
selected.
The input of P12 can be used even when CNTR (output) is selected.
The input/output of P20, P21, P30 and P31 can be used even when AIN0, AIN1, AIN2 and AIN3 are
selected.
(4)
Connection of unused pins
Table 3.3.1 shows the connections of unused pins.
(5)
SD, RD instructions
When the SD and RD instructions are used, do not set “01102” or more to register Y.
(6)
Analog input pins
When both analog input AIN0–AIN3 and I/O ports P2 and P3 function are used, note the following;
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 input/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 undefined.
(7)
Notes on port P13/INT pin
When the bit 3 of register I1 is cleared, the RAM back-up mode is selected and the input of INT pin
is disabled, be careful about the following notes.
When the key-on wakeup function of port P13 is not used (register K13 = “0”), clear bits 2 and 3
of register I1 before system enters to the RAM back-up mode.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34508G4FP 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(chǔ)器容量:16KB(16K x 8) 程序存儲(chǔ)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(pán)
M34508G4GP(#UO) 制造商:Renesas Electronics Corporation 功能描述:
M34508G4HFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER