SIC63616-(Rev. 1.0) NO. P156
3240-0412
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.
Table 4.13.7.1(a) Control bits of R/f converter
D3
D2
D1
D0
Name Init
∗
1
1
0
0
Off
[RFCKS2–0]
Frequency
1
f
OSC1
2
f
OSC1
/2
3
f
OSC1
/4
4
PT1
[RFCKS2–0]
Frequency
5
f
OSC3
6
f
OSC3
/2
7
f
OSC3
/4
FF15H
General RFCKS2 RFCKS1 RFCKS0
R/W
General
RFCKS2
RFCKS1
RFCKS0
0
0
0
0
General-purpose register
R/f converter
clock frequency
selection
MC3
MC2
MC1
MC0
–
∗
2
–
∗
2
–
∗
2
–
∗
2
Measurement counter MC0–MC3
LSB
R/W
R/W
FF62H
MC3
MC2
MC1
MC0
MC7
MC6
MC5
MC4
–
∗
2
–
∗
2
–
∗
2
–
∗
2
Measurement counter MC4–MC7
FF63H
MC7
MC6
MC5
MC4
FF60H
RFCNT RFOUT ERF1
ERF0
R/W
RFCNT
RFOUT
ERF1
ERF0
0
0
0
0
Continue
Enable
Normal
Disable
Continuous oscillation enable
RFOUT enable
R/f
conversion
selection
0
I/O
1
Ch.0 DC
2
Ch.1 AC
3
Ch.1 DC
[ERF1, 0]
R/f conversion
MC19
MC18
MC17
MC16
–
∗
2
–
∗
2
–
∗
2
–
∗
2
MSB
Measurement counter MC16–MC19
R/W
FF66H
MC19
MC18
MC17
MC16
R/W
MC11
MC10
MC9
MC8
–
∗
2
–
∗
2
–
∗
2
–
∗
2
Measurement counter MC8–MC11
FF64H
MC11
MC10
MC9
MC8
R/W
MC15
MC14
MC13
MC12
–
∗
2
–
∗
2
–
∗
2
–
∗
2
Measurement counter MC12–MC15
FF65H
MC15
MC14
MC13
MC12
FF61H
OVTC
OVMC RFRUNR RFRUNS
R/W
OVTC
OVMC
RFRUNR
RFRUNS
0
0
0
0
Overflow
Overflow
Run
Run
Non-ov
Non-ov
Stop
Stop
Time base counter overflow flag
Measurement counter overflow flag
Reference oscillation Run control/status
Sensor oscillation Run control/status
TC3
TC2
TC1
TC0
–
∗
2
–
∗
2
–
∗
2
–
∗
2
R/W
FF67H
TC3
TC2
TC1
TC0
Time base counter TC0–TC3
Address
Comment
Register
TC11
TC10
TC9
TC8
–
∗
2
–
∗
2
–
∗
2
–
∗
2
R/W
FF69H
TC11
TC10
TC9
TC8
TC7
TC6
TC5
TC4
–
∗
2
–
∗
2
–
∗
2
–
∗
2
R/W
FF68H
TC7
TC6
TC5
TC4
Time base counter TC8–TC11
Time base counter TC4–TC7
1
0
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read
Table 4.13.7.1(b) Control bits of R/f converter
Содержание S1C63616
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