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SVD3 Control Register
Register name
Bit
SVD3CTL
15
14–13
12–8
7–4
3
2–1
0
Bit 15
VDSEL
This bit selects the power supply voltage to be detected by SVD3.
1 (R/WP): Voltage applied to the EXSVDn pin
0 (R/WP): V
Bits 14–13
SVDSC[1:0]
These bits set the condition to generate an interrupt/reset (number of successive low
voltage detections) in intermittent operation mode (SVD3CTL.SVDMD[1:0] bits = 0x1 to
0x3).
Table 11.6.2 Interrupt/Reset Generating Condition in Intermittent Operation Mode
SVD3CTL.SVDSC[1:0] bits
This setting is ineffective in continuous operation mode (SVD3CTL.SVDMD[1:0] bits = 0x0).
Bits 12–8
SVDC[4:0]
These bits select an SVD detection voltage V
detecting low voltage.
Table 11.6.3 Setting of SVD Detection Voltage V
For the configurable range and voltage values, refer to "Supply Voltage Detector
Characteristics, SVD detection voltage V
"Electrical Characteristics" chapter.
Bits 7–4
SVDRE[3:0]
These bits enable/disable the reset issuance function when a low power supply voltage is
detected.
0xa (R/WP):
Other than 0xa (R/WP): Disable (Generate interrupt)
For more information on the SVD3 reset issuance function, refer to "SVD3 Reset."
11-8
Bit name
Initial
VDSEL
0
SVDSC[1:0]
0x0
SVDC[4:0]
0x1e
SVDRE[3:0]
0x0
EXSEL
0
SVDMD[1:0]
0x0
MODEN
0
DD
0x3
Low power supply voltage is successively detected eight times.
0x2
Low power supply voltage is successively detected four times.
0x1
Low power supply voltage is successively detected twice.
0x0
Low power supply voltage is successively detected once.
SVD3CTL.SVDC[4:0] bits
0x1f
0x1e
0x1d
:
0x02
0x01
0x00
Enable (Issue reset)
Seiko Epson Corporation
Reset
R/W
H1
R/WP
H0
R/WP
Writing takes effect when the
SVD3CTL.SVDMD[1:0] bits are not 0x0.
H1
R/WP
H1
R/WP
H1
R/WP
H0
R/WP
H1
R/WP
Interrupt/reset generating condition
/EXSVD detection voltage V
SVD
/EXSVD Detection Voltage V
SVD
SVD detection voltage VSVD/
EXSVD detection voltage VSVD_EXT [V]
High
↑
↓
Low
/EXSVD detection voltage V
SVD
Remarks
–
–
for
SVD_EXT
SVD_EXT
" in the
SVD_EXT
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
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