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參數(shù)資料
| 型號(hào)： | S1C88104P0A0100 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PBGA240 |
| 封裝： | VFBGA10H-216 |
| 文件頁(yè)數(shù)： | 57/211頁(yè) |
| 文件大小： | 1802K |
| 代理商： | S1C88104P0A0100 |
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S1C8F626 TECHNICAL MANUAL
EPSON
7
2 POWER SUPPLY
2POWER SUPPLY
This section explains the operating voltage and the configuration of the internal power supply
circuit of the S1C8F626.
2.1 Operating Voltage
The S1C8F626 operating power voltage is as
follows:
Normal operation mode:
1.8 V to 3.6 V
Flash programming mode: 2.7 V to 3.6 V
2.2 Internal Power Supply Circuit
The S1C8F626 incorporates the power supply
circuit shown in Figure 2.2.1. When voltage within
the range described above is supplied to VDD (+)
and VSS (GND), all the voltages needed for the
internal circuit are generated internally in the IC.
Roughly speaking, the power supply circuit is
divided into three sections.
Table 2.2.1 Power supply circuit
Circuit
Oscillation circuits,
Internal circuits
LCD system voltage
regulator
LCD driver
Power supply circuit
Internal logic
voltage regulator
Power voltage
booster
LCD system voltage
regulator
Output voltage
VD1
VDD or VD2
VC1–VC5
The internal logic voltage regulator generates the
operating voltage <VD1> for driving the internal
logic circuits and the oscillation circuit.
The VD1 voltage value can be switched in program;
it should be set to 1.8 V in normal operation mode
or 2.5 V in Flash programming mode. Refer to
Section 5.4, "Oscillation Circuits and Operating
Mode", for how to switch the VD1 voltage.
The power voltage booster generates the operating
voltage <VD2> for the LCD system voltage
regulator. Either <VDD> or <VD2> can be selected
as the power source for the LCD system voltage
regulator according to the <VDD> power supply
voltage level.
Table 2.2.2 Power source for LCD system
voltage regulator
Supply voltage
VDD
1.8–2.5 V
2.5–3.6 V
Power source for
LCD system voltage regulator
VD2
VDD
The VD2 voltage is about double the VDD voltage
level. Refer to Chapter 9, "ELECTRICAL
CHARACTERISTICS", for details.
The LCD system voltage regulator generates the 1/
5-bias LCD drive voltages <VC1>, <VC2>, <VC3>,
<VC4> and <VC5>. See Chapter 9, "ELECTRICAL
CHARACTERISTICS" for the voltage values.
In the S1C8F626, the LCD drive voltage is supplied
to the built-in LCD driver which drives the LCD
panel connected to the SEG and COM terminals.
Notes: Under no circumstances should VD1,VD2,
VC1, VC2, VC3, VC4 and VC5, terminal
output be used to drive external circuit.
If VDD is used as the power source for the
LCD system voltage regulator when VDD is
2.5 V or less, the VC1 to VC5 voltages
cannot be generated within specifications.
VDD
VD1
VD2
CF
CG
VC1
VC2
VC3
VC4
VC5
CA
CB
CC
CD
CE
VSS
Internal logic
voltage regulator
LCD system
voltage regulator
Oscillation circuit
LCD driver
VD1
VC1–VC5
Power voltage
booster
External
power
supply
OSC1, OSC2
OSC3, OSC4
COM0–COM31
SEG0–SEG95
Internal circuit
VD2
VDSEL
VDC
DBON
Fig. 2.2.1 Configuration of power supply circuit
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