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參數(shù)資料
| 型號： | M34501E4FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, MICROCONTROLLER, PDSO20 |
| 封裝： | 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 60/116頁 |
| 文件大小： | 859K |
| 代理商： | M34501E4FP |
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Rev.3.01
2005.02.07
page 48 of 112
REJ03B0104-0301
4501 Group
(5) External clock
When the external signal clock is used as the source oscillation
(f(XIN)), connect the XIN pin to the clock source and leave XOUT pin
open. Then, execute the CMCK instruction (Figure 47).
Be careful that the maximum value of the oscillation frequency
when using the external clock differs from the value when using the
ceramic resonator (refer to the recommended operating condition).
Also, note that the RAM back-up mode (POF and POF2 instruc-
tions) cannot be used when using the external clock.
(6) Clock control register MR
Register MR controls system clock. Set the contents of this register
through register A with the TMRA instruction. In addition, the TAMR
instruction can be used to transfer the contents of register MR to
register A.
Table 19 Clock control register MR
Fig. 47 External clock input circuit
ROM ORDERING METHOD
Please submit the information described below when ordering
Mask ROM.
(1) Mask ROM Order Confirmation Form ..................................... 1
(2) Data to be written into mask ROM ............................... EPROM
(three sets containing the identical data)
(3) Mark Specification Form .......................................................... 1
For the mask ROM confirmation and the mark specifications,
refer to the “Renesas Technology Corp.” Homepage
(http://www.renesas.com/en/rom).
Note : “R” represents read enabled, and “W” represents write enabled.
MR3
Clock control register MR
System clock
f(XIN) (high-speed mode)
f(XIN)/2 (middle-speed mode)
f(XIN)/4 (low-speed mode)
f(XIN)/8 (default mode)
This bit has no function, but read/write is enabled.
at reset : 11002
at RAM back-up : 11002
MR3
0
1
R/W
Not used
System clock selection bits
0
1
0
1
MR2
0
1
0
1
MR1
MR0
MR2
4501
XIN
XOUT
External oscillation circuit
VDD
VSS
Execute the CMCK
instruction in program.
*
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34501M2 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M4 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M4-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34502E4 | 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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