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19 R/F CONVERTER (RFC)
Bit 0
SREF
This bit controls CR oscillation for the reference resistor. This bit also indicates the CR oscillation sta-
tus.
1 (W):
Start oscillation
0 (W):
Stop oscillation
1 (R):
Being oscillated
0 (R):
Stopped
Notes: • Settings in this register are all ineffective when the RFCnCTL.MODEN bit = 0 (RFC operation
disabled).
• When writing 1 to the RFCnTRG.SREF bit, the RFCnTRG.SSENA bit, or the RFCnTRG.
SSENB bit to start oscillation, be sure to avoid having more than one bit set to 1.
• Be sure to clear the interrupt flags (RFCnINTF.EREFIF bit, RFCnINTF.ESENAIF bit, RFCnINTF.
ESENBIF bit, RFCnINTF.OVMCIF bit, and RFCnINTF.OVTCIF bit) before starting oscillation
using this register.
RFC Ch.n Measurement Counter Low and High Registers
Register name
Bit
RFCnMCL
15–0 MC[15:0]
RFCnMCH
15–8 –
7–0 MC[23:16]
Or
Register name
Bit
RFCnMCL
31–24 –
RFCnMCH
23–0 MC[23:0]
Bits 31–24 Reserved
Bits 23–0 MC[23:0]
Measurement counter data can be read and written through these bits.
Note: The measurement counter must be set from the low-order value (RFCnMCL.MC[15:0] bits) first
when data is set using a 16-bit access instruction. The counter may not be set to the correct
value if the high-order value (RFCnMCH.MC[23:16] bits) is written first.
RFC Ch.n Time Base Counter Low and High Registers
Register name
Bit
RFCnTCL
15–0 TC[15:0]
RFCnTCH
15–8 –
7–0 TC[23:16]
Or
Register name
Bit
RFCnTCL
31–24 –
RFCnTCH
23–0 TC[23:0]
Bits 31–24 Reserved
Bits 23–0 TC[23:0]
Time base counter data can be read and written through these bits.
Note: The time base counter must be set from the low-order value (RFCnTCL.TC[15:0] bits) first when
data is set using a 16-bit access instruction. The counter may not be set to the correct value if
the high-order value (RFCnTCH.TC[23:16] bits) is written first.
19-10
Bit name
Initial
0x0000
0x00
0x00
Bit name
Initial
0x00
0x000000
Bit name
Initial
0x0000
0x00
0x00
Bit name
Initial
0x00
0x000000
Seiko Epson Corporation
Reset
R/W
H0
R/W
–
–
R
–
H0
R/W
Reset
R/W
–
R
–
H0
R/W
Reset
R/W
H0
R/W
–
–
R
–
H0
R/W
Reset
R/W
–
R
–
H0
R/W
S1C17W18 TECHNICAL MANUAL
Remarks
Remarks
Remarks
Remarks
(Rev. 1.2)
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