Continuous Oscillation Function - Epson S1C63616 Technical Manual

4.13.6 Continuous oscillation function

By setting the RFCNT register to "1", the reference oscillation or sensor oscillation can be continued even if
the stop condition has been met. This function with RFOUT enabled allows easy measurement of the CR
oscillation frequency.
4.13.7 I/O memory of R/f converter
Table 4.13.7.1 shows the I/O addresses and the control bits for the R/f converter.
Register
Address
D3 D2 D1
General RFCKS2 RFCKS1 RFCKS0
FF15H
R/W
RFCNT RFOUT ERF1
FF60H
R/W
OVTC OVMC RFRUNR RFRUNS
FF61H
R/W
MC3 MC2 MC1
FF62H
R/W
MC7 MC6 MC5
FF63H
R/W
MC11 MC10 MC9
FF64H
R/W
MC15 MC14 MC13
FF65H
R/W
MC19 MC18 MC17
FF66H
R/W
TC3 TC2 TC1
FF67H
R/W
TC7 TC6 TC5
FF68H
R/W
TC11 TC10 TC9
FF69H
R/W
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read
Table 4.13.7.1(a) Control bits of R/f converter
∗1
D0 Name Init 1
General 0 1
RFCKS2 0
RFCKS1 0
RFCKS0 0
RFCNT 0 Continue
ERF0
RFOUT 0 Enable
ERF1 0
ERF0 0
OVTC 0 Overflow
OVMC 0 Overflow
RFRUNR 0 Run
RFRUNS 0 Run
∗2
MC3 –
MC0
∗2
MC2 –
∗2
MC1 –
∗2
MC0 –
∗2
MC7 –
MC4
∗2
MC6 –
∗2
MC5 –
∗2
MC4 –
∗2
MC11 –
MC8
∗2
MC10 –
∗2
MC9 –
∗2
MC8 –
∗2
MC15 –
MC12
∗2
MC14 –
∗2
MC13 –
∗2
MC12 –
∗2
MC19 –
MC16
∗2
MC18 –
∗2
MC17 –
∗2
MC16 –
∗2
TC3 –
TC0
∗2
TC2 –
∗2
TC1 –
∗2
TC0 –
∗2
TC7 –
TC4
∗2
TC6 –
∗2
TC5 –
∗2
TC4 –
∗2
TC11 –
TC8
∗2
TC10 –
∗2
TC9 –
∗2
TC8 –
Table 4.13.7.1(b) Control bits of R/f converter
0
0 General-purpose register
[RFCKS2–0]
R/f converter
Frequency
clock frequency
[RFCKS2–0]
selection
Frequency
Normal Continuous oscillation enable
Disable RFOUT enable
R/f
[ERF1, 0]
conversion
R/f conversion
selection
Non-ov
Time base counter overflow flag
Non-ov Measurement counter overflow flag
Stop Reference oscillation Run control/status
Stop
Sensor oscillation Run control/status
Measurement counter MC0–MC3
LSB
Measurement counter MC4–MC7
Measurement counter MC8–MC11
Measurement counter MC12–MC15
MSB
Measurement counter MC16–MC19
Time base counter TC0–TC3
Time base counter TC4–TC7
Time base counter TC8–TC11
SIC63616-(Rev. 1.0) NO. P156
Comment
0 1 2
Off f f /2 f
OSC1 OSC1 OSC1
4 5 6
PT1 f f /2 f
OSC3 OSC3 OSC3
0 1 2
I/O Ch.0 DC Ch.1 AC Ch.1 DC
3240-0412
3
/4
7
/4
3