- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358635 > 38B5 (Renesas Technology Corp.) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | 38B5 |
| 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)： | 61/70頁 |
| 文件大小： | 864K |
| 代理商： | 38B5 |
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頁當(dāng)前第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
MITSUBISHI MICROCOMPUTERS
38B5 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
60
PRELIMINARY
Notice: This s not a final specification.
Some parametric imits are subject to change.
NOTES ON PROGRAMMING
Processor Status Register
The contents of the processor status register (PS) after a reset are
undefined, except for the interrupt disable flag (I) which is “1.” After a
reset, initialize flags which affect program execution. In particular, it
is essential to initialize the index X mode (T) and the decimal mode
(D) flags because of their effect on calculations.
Interrupts
The contents of the interrupt request bits do not change immediately
after they have been written. After writing to an interrupt request reg-
ister, execute at least one instruction before performing a BBC or
BBS instruction.
Decimal Calculations
To calculate in decimal notation, set the decimal mode flag (D) to
“1,” then execute an ADC or SBC instruction. Only the ADC and
SBC instructions yield proper decimal results. After executing an
ADC or SBC instruction, execute at least one instruction before ex-
ecuting a SEC, CLC, or CLD instruction.
In decimal mode, the values of the negative (N), overflow (V), and
zero (Z) flags are invalid.
Timers
If a value n (between 0 and 255) is written to a timer latch, the fre-
quency division ratio is 1/(n+1).
Multiplication and Division Instructions
The index X mode (T) and the decimal mode (D) flags do not affect
the MUL and DIV instruction.
The execution of these instructions does not change the contents of
the processor status register.
Ports
The contents of the port direction registers cannot be read. The
following cannot be used:
The data transfer instruction (LDA, etc.)
The operation instruction when the index X mode flag (T) is “1”
The addressing mode which uses the value of a direction register
as an index
The bit-test instruction (BBC or BBS, etc.) to a direction register
The read-modify-write instructions (ROR, CLB, or SEB, etc.) to a
direction register.
Use instructions such as LDM and STA, etc., to set the port direction
registers.
Serial I/O
Using an external clock
When using an external clock, input “H” to the external clock input
pin and clear the serial I/O interrupt request bit before executing
serial I/O transfer and serial I/O automatic transfer.
Using an internal clock
When using an internal clock, set the synchronous clock to the in-
ternal clock, then clear the serial I/O interrupt request bit before ex-
ecuting a serial I/O transfer and serial I/O automatic transfer.
A-D Converter
The comparator uses internal capacitors whose charge will be lost if
the clock frequency is too low.
Therefore, make sure that f(X
IN
) is at least on 250 kHz during an A-D
conversion.
Do not execute the STP or WIT instruction during an A-D conver-
sion.
Instruction Execution Time
The instruction execution time is obtained by multiplying the frequency
of the internal system clock by the number of cycles needed to ex-
ecute an instruction.
The number of cycles required to execute an instruction is shown in
the list of machine instructions.
The frequency of the internal system clock is the same of the X
IN
frequency in high-speed mode.
At STP Instruction Release
At the STP instruction release, all bits of the timer 12 mode register
are cleared.
The X
COUT
drivability selection bit (the CPU mode register) is set to
“1” (high drive) in order to start oscillating.
NOTES ON USE
Notes on Built-in EPROM Version
The P4
7
pin of the One Time PROM version or the EPROM version
functions as the power source input pin of the internal EPROM.
Therefore, this pin is set at low input impedance, thereby being af-
fected easily by noise.
To prevent a malfunction due to noise, insert a resistor (approx. 5
k
) in series with the P4
7
pin.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 38C1 | DIODE ZENER SINGLE 200mW 24Vz 0.05mA-Izt 0.05 0.05uA-Ir 18.2 SOD-323 3K/REEL |
| 38C2 | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 38D5 | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 38F1222 | 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit |
| TA5M | STECKER DIN MINI 5POL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 38B5_M | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
| 38B7 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:38B7 Group Datasheet Datasheet 2038K/OCT.30.00 |
| 38B7_M | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
| 38BC0-550 | 功能描述:SWITCH PUSHBUTTON SPDT 0.4VA 20V RoHS:是 類別:開關(guān) >> 按鈕 系列:38BC 標(biāo)準(zhǔn)包裝:1 系列:A16 類型:標(biāo)準(zhǔn)，發(fā)光式 電路:雙刀雙擲 開關(guān)功能:開-瞬時(shí) 額定電流:5A（AC） 額定電壓 - AC:125V 額定電壓 - DC:- 觸動(dòng)器類型:方形，按鈕 顏色 - 致動(dòng)器/蓋:黃 發(fā)光類型，顏色:LED，黃 發(fā)光電壓:12 VDC 安裝類型:前面板安裝 端接類型:焊接，快速連接 - 0.110"（2.8mm） 防護(hù)等級:IP65 - 防塵/防油/防水 特點(diǎn):- 面板切口尺寸:圓形 - 直徑 16.00mm 包裝:散裝 工作溫度:-10°C ~ 55°C 機(jī)械壽命:2,000,000 次循環(huán) 電氣壽命:100,000 次循環(huán) 其它名稱:A165LAYM12D2 |
| 38BC-0-H-1-S | 功能描述:SWITCH PUSH SPDT 0.4VA 20V RoHS:否 類別:開關(guān) >> 按鈕 系列:38BC 標(biāo)準(zhǔn)包裝:1 系列:A16 類型:標(biāo)準(zhǔn)，發(fā)光式 電路:雙刀雙擲 開關(guān)功能:開-瞬時(shí) 額定電流:5A（AC） 額定電壓 - AC:125V 額定電壓 - DC:- 觸動(dòng)器類型:方形，按鈕 顏色 - 致動(dòng)器/蓋:黃 發(fā)光類型，顏色:LED，黃 發(fā)光電壓:12 VDC 安裝類型:前面板安裝 端接類型:焊接，快速連接 - 0.110"（2.8mm） 防護(hù)等級:IP65 - 防塵/防油/防水 特點(diǎn):- 面板切口尺寸:圓形 - 直徑 16.00mm 包裝:散裝 工作溫度:-10°C ~ 55°C 機(jī)械壽命:2,000,000 次循環(huán) 電氣壽命:100,000 次循環(huán) 其它名稱:A165LAYM12D2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。