參數(shù)資料
型號(hào)： S1C6S460D
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC124
封裝： 4.69 X 4.68 MM, DIE-124
文件頁(yè)數(shù)： 25/107頁(yè)
文件大?。?/td> 788K
代理商： S1C6S460D
16
EPSON
S1C6S460 TECHNICAL MANUAL
CHAPTER 3: POWER SOURCE
3.2 SVD (Supply Voltage Detection) Circuit
3.2.1 Configuration of SVD circuit
The S1C6S460 has a built-in SVD (supply voltage detection) circuit which allows detection of power
voltage drop through software.
Turning the SVD operation on and off can be controlled through the software. Because the IC consumes a
large amount of current during SVD operation, it is recommended that the SVD operation be kept OFF
unless it is otherwise necessary.
Also, the SVD criteria voltage can be set by software. The criteria voltage can be set by matching to one of
the 4 types of batteries below that can be used.
-2.2, -2.5, -3.1, -4.2 V (VDD reference voltage)
See "14 Electrical Characteristics" for the precision of the criteria voltage.
Figure 3.2.1.1 shows the configuration of the SVD circuit.
Address F73H
VDD
VSS
SVD circuit
SVDON
Detected data
Data
bus
SVC1
SVC0
Criteria voltage
setting circuit
SVDDT
Fig. 3.2.1.1 Configuration of SVD circuit
3.2.2 Control of SVD circuit
The SVD operation control registers are explained below.
Table 3.2.2.1 Control registers of SVD circuit
Address
Comment
Register
D3
D2
D1
D0
Name
Init
1
0
F73H
SVC0
SVDDT
SVDON
SVC1
SVC0
1
0
X
Low
On
Normal
Off
SVC1
R/W
SVDON
SVDDT
R
SVD evaluation data
SVD circuit On/Off
SVD criteria voltage setting
SVC0 and SVC1 (F73H [D0 and D1], R/W)
Criteria voltage for supply voltage detection is set as shown in Table 3.2.2.2.
Table 3.2.2.2 Criteria voltage for SVD circuit
SVC1 SVC0
Criteria voltage
0
-2.2 V
0
1
-2.5 V
1
0
-3.1 V
1
-4.2 V
The VDD reference voltage is used as the criteria voltage.
At initial reset, this register becomes undefined.
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