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Seiko epson Corporation
S1C17153 TeChniCal Manual
(Rev. 1.0)
PCLK is not required for the peripheral modules/functions shown below.
Peripheral circuits/functions that do not use PCLK
• Real-time clock
• Clock timer
• Watchdog timer
• LCD driver
• Sound generator
• SVD circuit
• 16-bit PWM timer Ch.0
• UART Ch.0
• FOUTA/FOUTB outputs
Table B.1.1 shows a list of methods for clock control and starting/stopping the CPU.
1.1 Clock Control List
Table B.
Current
consumption
OSC1a
OSC3B
CPu (CClK)
PClK
peripheral
RTC
OSC1a
peripheral
CPu stop
method
CPu startup
method
↑
Low
Stop
Stop
Stop
Stop
Stop
Stop
Execute
slp
instruction
1
Oscillation
(for RTC)
Stop
Stop
Stop
Run
Stop
Execute
slp
instruction
1, 2
Oscillation
(for RTC)
Stop
Stop
Stop
Run
Stop
Execute
halt
instruction
1, 2
Oscillation
(system CLK)
Stop
Stop
Stop
Run
Run
Execute
halt
instruction
1, 2, 3
Oscillation
(system CLK)
Stop
Stop
Run
Run
Run
Execute
halt
instruction
1, 2, 3, 4
Oscillation
(system CLK)
Stop
Run
(1/1)
Run
Run
Run
Oscillation
Oscillation
(system CLK)
Stop
Run
Run
Run
Execute
halt
instruction
1, 2, 3, 4
Oscillation
Oscillation
(system CLK)
Run
(low gear)
Run
Run
Run
High
↓
Oscillation
Oscillation
(system CLK)
Run
(1/1)
Run
Run
Run
HALT and SLEEP mode cancelation methods (CPU startup method)
1. Startup by port
Started up by an I/O port interrupt.
2. Startup by RTC
Started up by an RTC interrupt.
3. Startup by OSC1A peripheral circuit
Started up by a clock timer or watchdog timer interrupt.
4. Startup by PCLK peripheral circuit
Started up by a PCLK peripheral circuit interrupt.