
S1C6N3B0 TECHNICAL MANUAL
EPSON
15
CHAPTER 4: PERIPHERAL CIARCUITS AND OPERATION (Oscillation Circuit)
Table 4.2.6.1 shows the frequencies of the clocks/signals used in the peripheral circuits.
Table 4.2.6.1 Frequency of peripheral circuit clocks/signals
Clocks and signals
CPU operating clock
Input port noise rejection clock
Buzzer signal (fBZL)
Buzzer signal (fBZH)
FOUT signal (F1-1)
FOUT signal (F1-2,F2-1)
FOUT signal (F1-3,F2-2,F3-1)
FOUT signal (F1-4,F2-3,F3-2,F4-1)
FOUT signal (F1-5,F2-4,F3-3,F4-2)
FOUT signal (F2-5,F3-4,F4-3)
FOUT signal (F3-5,F4-4)
FOUT signal (F4-5)
LCD FR signal (1/4 duty)
LCD FR signal (1/3 duty)
LCD FR signal (1/2 duty)
Clock timer input clock
Clock timer data (D3)
Clock timer data (D2)
Clock timer data (D1)
Clock timer data (D0)
Clock timer interrupt (IT32)
Clock timer interrupt (IT8)
Clock timer interrupt (IT2)
Stopwatch timer input clock
Serial I/F input clock (CLK)
Frequency
S1C6N3B0
Crystal oscillation
(32.768 kHz)
fOSC=32kHz
fOSC/8=4kHz
fOSC/16=2kHz
fOSC/8=4kHz
fOSC/128=256Hz
fOSC/64=512Hz
fOSC/32=1kHz
fOSC/16=2kHz
fOSC/8=4kHz
fOSC/4=8kHz
fOSC/2=16kHz
fOSC/1=32kHz
fOSC/1024=32Hz
fOSC/768=42.7Hz
fOSC/1024=32Hz
fOSC/128=256Hz
fOSC/16384=2Hz
fOSC/8192=4Hz
fOSC/4096=8Hz
fOSC/2048=16Hz
fOSC/1024=32Hz
fOSC/4096=8Hz
fOSC/16384=2Hz
fOSC/128=256Hz
fOSC=32kHz
S1C6N3B0
CR oscillation
(65 kHz)
fOSC=65kHz
fOSC/8=8kHz
fOSC/16=4kHz
fOSC/8=8kHz
fOSC/128=512Hz
fOSC/64=1kHz
fOSC/32=2kHz
fOSC/16=4kHz
fOSC/8=8kHz
fOSC/4=16kHz
fOSC/2=32kHz
fOSC/1=65kHz
fOSC/1024=64Hz
fOSC/768=85.3Hz
fOSC/1024=64Hz
fOSC/128=512Hz
fOSC/16384=4Hz
fOSC/8192=8Hz
fOSC/4096=16Hz
fOSC/2048=32Hz
fOSC/1024=64Hz
fOSC/4096=16Hz
fOSC/16384=4Hz
fOSC/128=512Hz
fOSC=65kHz
S1C6A3B0
Ceramic oscillation
(fDVIN=fOSC/12)
fOSC
fOSC/96
fOSC/192
fOSC/96
fOSC/1536
fOSC/768
fOSC/384
fOSC/192
fOSC/96
fOSC/48
fOSC/24
fOSC/12
fOSC/12288
fOSC/9216
fOSC/12288
fOSC/1536
fOSC/196608
fOSC/98304
fOSC/49152
fOSC/24576
fOSC/12288
fOSC/49152
fOSC/196608
fOSC/1536
fOSC
S1C6A3B0
CR oscillation
(fDVIN=fOSC/6)
fOSC
fOSC/48
fOSC/96
fOSC/48
fOSC/768
fOSC/384
fOSC/192
fOSC/96
fOSC/48
fOSC/24
fOSC/12
fOSC/6
fOSC/6144
fOSC/4608
fOSC/6144
fOSC/768
fOSC/98304
fOSC/49152
fOSC/24576
fOSC/12288
fOSC/6144
fOSC/24576
fOSC/196608
fOSC/768
fOSC
fOSC: Oscillation frequency
fDVIN: Input clock frequency of divider for peripheral circuits
Note: This manual describes frequencies and times when the crystal oscillation circuit (32.768 kHz) of
the S1C6N3B0 has been selected unless there has been a special description. Be aware that the
frequencies and times vary when the S1C6N3B0 CR oscillator model or the S1C6A3B0 is used.
4.2.7 Operation in SLEEP mode
The S1C6N3B0 CR oscillator model and the S1C6A3B0 can incorporate the SLEEP function that reduces
current consumption in the standby mode with mask option selection.
The oscillation circuit stops oscillating when the SLEEP mode is set by the SLP instruction.
The oscillation circuit resumes oscillating when an input interrupt cancels the SLEEP mode, however
some startup time is required for stabilizing oscillation (See Chapter 6, "Electrical Characteristics").
Therefore be sure the interval is long enough before controlling the peripheral circuits that use the
oscillation clock as the source clock.
Note that the oscillation detection function cannot be used when the SLEEP function is selected by mask
option.