參數(shù)資料
型號(hào)： S1C63358F0A0100
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP15-100
文件頁(yè)數(shù)： 28/38頁(yè)
文件大小： 1226K
代理商： S1C63358F0A0100
24
EPSON
S1C63358 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Setting of Power Supply and Operating Mode)
Table 4.2.2.1 Power supply voltage and operating mode
Power supply
circuit
Oscillation system
voltage regulator
Operating
condition
OSC1
OSC3, 4 MHz
Power supply voltage VDD (V)
0.9–1.4
1.4–2.3
2.3–3.6
VC2 mode
Normal mode
Cannot work
Normal mode
Operating
voltage VD1
1.35 V
2.25 V
* Set the VC2 mode when a supply voltage drop is detected by the SVD circuit, such as during a
heavy load operation (driving buzzer or lamp) or by battery deletion.
(1) Power supply voltage VDD = 0.9 V to 1.4 V
When the power supply voltage is in this range, the oscillation system voltage regulator can operate
only in the VC2 mode.
Set the VC2 mode with software, and do not change it to another mode during operation.
(2) Power supply voltage VDD = 1.4 V to 2.3 V
When the CPU operates with the OSC1 clock (OSC3 oscillation circuit is OFF), the oscillation system
voltage regulator can operate in the normal mode. Be sure not to set in the VC2 mode.
(3) Power supply voltage VDD = 2.3 V to 3.6 V
When the power supply voltage is in this range, the oscillation system voltage regulator can always
operate in the normal mode regardless of the oscillation circuit setting. Be sure not to set in the VC2
mode.
The OSC3 oscillation circuit can be used in this voltage range.
4.2.3 Operating mode for LCD system voltage circuit
The LCD system voltage circuit generates the voltage VC1, VC2 and VC3 for driving the LCD. The LCD
system voltage circuit generates VC1 by the regulator, and boosts it to generate the other 2 voltages.
Turning the LCD power supply circuit ON/OFF can be controlled using the register LPWR. The LCD
drive voltage is output to the LCD driver only when the circuit is ON (LPWR = "1").
(1) Power supply voltage VDD = 0.9 V to 1.4 V
When the power supply voltage is in this range, the VC1 voltage will follow the VDD voltage, so the
LCD display contrast will become worse.
(2) Power supply voltage VDD = 1.4 V to 3.6 V
When the power supply voltage is in this range, the VC1 voltage will keep 1.05 V, so the LCD display
will keep the same contrast.
4.2.4 Operating mode for A/D converter voltage circuit
The A/D converter uses AVDD and VDD or VC2 as the power source for internal control circuit.
Table 4.2.4.1 Power supply voltage and operating mode
Circuit
A/D converter
Power supply voltage VDD (V)
0.9–1.6
1.6–3.6
VC2 mode
Normal mode
(1) Power supply voltage VDD = 1.6 V to 3.6 V
When the power supply voltage is in this range, it is possible to operate in the normal mode. Be sure
not set in the VC2 mode.
(2) Power supply voltage VDD = 0.9 V to 1.6 V
When the power supply voltage is in this range, VADSEL should be set to "1", to choose VC2 as the
A/D converter power.
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