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參數(shù)資料
| 型號： | MSM6575-XXGS-2K |
| 廠商： | LAPIS SEMICONDUCTOR CO LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 0.032768 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | 9 X 10 MM, 0.80 MM PITCH, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 182K |
| 代理商： | MSM6575-XXGS-2K |
9/13
MSM6545/6575/6545L/6575L
Semiconductor
NOTES ON USE
Power Supply for 0.9 V Microcontroller Series (Backup Flag and Constant-Voltage Circuit)
The 0.9 V devices have a built-in constant-voltage circuit. The output of this constant-voltage
circuit powers the microcontroller's internal logic circuits. Setting a backup flag (BUF) allows
the input of the constant voltage circuit to be switched to either the battery or the output
generated in the voltage converter, based on the battery voltage. A battery voltage of 1.5 V or
3.0 V can be selected.
The output (VEE) of the constant-voltage circuit is set at approximately –1.3 V. This allows the
current consumed by the internal logic to be limited, irrespective of the battery voltage.
However, if the input of the constant voltage circuit is below this set value (approximately –
1.3V), the output (VEE) is equal to the input. The 0.9 V microcontroller can be operated even if
the internal voltage (output from the constant voltage circuit) falls to 0.9 V. Setting the backup
flag allows a larger operating voltage margin despite changes in internal voltage due to noise.
For example, for the 1.5 V specification, setting the backup flag at "0" supplies twice the battery
voltage to the constant voltage circuit. Thus, even if the battery voltage falls to 0.9 V, the output
voltage (VEE) is maintained at –1.3 V, providing a larger margin of operating voltage of the
internal logic circuits, because 1.8 V is applied to the input of the constant-voltage circuit.
Figures 1 to 4 show the internal status depending on the backup flag settings for the battery, as
well as status features.
XTAL
VDD
(0 V)
VSS1
(–1.5 V)
VSS2
(–3.0 V)
VSS3*
(–4.5 V)
VEE
(About–1.3 V)
LCD driver*
Voltage converter
Backup flag
(BUF)
Constant voltage circuit
VR
Internal logic
XT
XTB
* The VSS3 pin is provided for the devices that contain an
LCD driver.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM6575-XXGS-K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9 V and Built-in Buzzer Circuit 4-Bit Microcontroller |
| MSM6576 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9 V and 7-level Detector 4-Bit Microcontroller |
| MSM6576-XXGS-2K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9 V and 7-level Detector 4-Bit Microcontroller |
| MSM6576-XXGS-K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9 V and 7-level Detector 4-Bit Microcontroller |
| MSM6577 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9V and Built-in LCD Driver 4-Bit Microcontroller |
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