
Appendix A: I/O Register List
S1C17601 TECHNICAL MANUAL
Seiko Epson Corporation
AP-31
0x53a0–0x53ae
RFC
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
RFC Control
Register
(RFC_CTL)
0x53a0
(16 bits)
D15–8 –
reserved
–
0 when being read.
D7
CONEN
Continuous oscillation enable
1 Enable
0 Disable
0
R/W
D6
EVTEN
Event counter mode enable
1 Enable
0 Disable
0
R/W
D5–4 SMODE
[1:0]
Sensor oscillation mode select
0:Resistive sensor DC oscillation
1:Resistive sensor AC oscillation
2:Capacitive sensor DC oscillation
SMODE[1:0]
mode
0
R/W
0x3
0x2
0x1
Reserced
CDC mode
RAC mode
D3–1 –
reserved
–
0 when being read.
D0
RFCEN
RFC Enable
1 Enable
0 Disable
0
R/W
RFC Oscillation
trigger
(RFC_TRG)
0x53a2
(16 bits)
D15–3 –
reserved
–
0 when being read.
D2
SSENB
Sensor B oscillation Start trigger
1 Read: Run
Write: Start
0 Read: Run
Write: Start
0
R/W 1234
D1
SSENA
Sensor A oscillation Start trigger
1 Read: Run
Write: Start
0 Read: Run
Write: Start
0
R/W 134
D0
SREF
Reference dc oscillation Start
trigger
1 Read: Run
Write: Start
0 Read: Run
Write: Start
0
R/W 134
RFC
Measurement
Counter LSB
(RFC_MCL)
0x53a4
(16 bits)
D15–0 MC[15:0]
Measurement Counter data D15-0
0x0 to 0xffff
0
R/W
RFC
Measurement
Counter MSB
(RFC_MCH)
0x53a6
(16 bits)
D15–8 –
reserved
–
0 when being read.
D7–0 MC[23:16]
Measurement Counter data
D23-16
0x0 to 0xff
0
R/W
RFC Time Base
Counter LSB
(RFC_TCL)
0x53a8
(16 bits)
D15–0 TC[15:0]
Time base Counter data D15-0
0x0 to 0xffff
0
R/W
RFC Time Base
Counter MSB
(RFC_MCH)
0x53aa
(16 bits)
D15–8 –
reserved
–
0 when being read.
D7–0 TC[23:16]
Time base Counter data D23-16
0x0 to 0xff
0
R/W
RFC Interrupt
Mask Register
(RFC_IMSK)
0x53ac
(16 bits)
D15–5 –
reserved
–
0 when being read.
D4
OVTCIE
Time base Counter Over flow error
interrupt enable
1 Enable
0 Disable
0
R/W
D3
OVMCIE
Measurement Counter Over flow
error interrupt enable
1 Enable
0 Disable
0
R/W
D2
ESENBIE
Sensor B oscillation end interrupt
Enable
1 Enable
0 Disable
0
R/W
D1
ESENAIE
Sensor A oscillation end interrupt
Enable
1 Enable
0 Disable
0
R/W
D0
EREFIE
Reference oscillation end Interrupt
Enable
1 Enable
0 Disable
0
R/W
RFC Interrupt
Flag Register
(RFC_IFLG)
0x53ae
(16 bits)
D15–5 –
reserved
–
0 when being read.
D4
OVTCIE
Time base Counter Over flow error
interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
0
R/W Reset by writing 1
D3
OVMCIE
Measurement Counter Over flow
error interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
0
R/W Reset by writing 1
D2
ESENBIE
Sensor B oscillation end interrupt
flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
0
R/W Reset by writing 1
D1
ESENAIE
Sensor A oscillation end interrupt
flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
0
R/W Reset by writing 1
D0
EREFIE
Reference oscillation end Interrupt
flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
0
R/W Reset by writing 1