- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358635 > 38D5 (Renesas Technology Corp.) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | 38D5 |
| 廠商： | 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) |
| 文件頁數(shù)： | 123/141頁 |
| 文件大?。?/td> | 2027K |
| 代理商： | 38D5 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁當(dāng)前第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁
Rev.3.01
REJ03B0158-0301
Aug 08, 2007
Page 123 of 134
38D5 Group
3. Direction Registers
The values of the port direction registers cannot be read. This
means, it is impossible to use the LDA instruction, memory
operation instruction when the T flag is “1”, addressing mode
using direction register values as qualifiers, and bit test
instructions such as BBC and BBS. It is also impossible to use bit
operation instructions such as CLB and SEB, and read-modify-
write instructions to direction registers, including calculations
such as ROR. To set the direction registers, use instructions such
as LDM or STA.
4. Pull-Up Control
Only for the pin set to input mode, pull-up is controlled by the
PULL register and the segment output disable register.
Notes on Termination of Unused Pins
1. Termination of Unused Pins
Perform the following at the shortest possible distance (20 mm or
less) from the MCU pins.
(1) I/O ports
Set the ports to input mode and connect each pin to V
CC
or V
SS
through a resistor of 1 k to 10 k
. An internal pull-up resistor can
also be used for the port where the internal pull-up resister is
selectable.
To set the ports to output mode, leave open at “L” or “H” output.
When setting the ports to output mode and leave open,
input mode in the initial state remains until the mode of the
ports are switched to output mode by a program after a
reset. This may cause the voltage level of the pins to be
undefined and the power source current to increase while
the ports remains in input mode. For any effects on the
system, careful system evaluations should be implemented
on the user side.
The direction registers may be changed due to a program
runaway or noise, so reset the registers periodically by a
program to increase the program reliability.
2. Termination Concerns
(1) When setting I/O ports to input mode
[1] Do not leave open
<Reason>
The power source current may increase depending on the
first-stage circuit.
The ports are more likely affected by noise when compared
with the termination shown on the above “1. (1) I/O ports”
[2] Do not connect to V
CC
or V
SS
directly
<Reason>
If the direction registers are changed to output mode due to a
program runaway or noise, a short circuit may occur.
[3] Do not connect multiple ports in a lump to V
CC
or V
SS
through a resistor.
<Reason>
If the direction registers are changed to output mode due to a
program runaway or noise, a short circuit may occur between the
ports.
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:Renesas Technology Corp 功能描述:Standard Characteristics Example |
| 38D5_08 | 制造商:RENESAS 制造商全稱: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: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，3分鐘左右您將得到回復(fù)。