APPENDIX B POWER SAVING
S1C17001 TECHNICAL MANUAL
EPSON
331
The peripheral modules listed below are operated by clocks other than PCLK, except for control register ac-
cess.
This means PCLK is not required after the control register has been set and operation started.
• Clock timer
• Stopwatch timer
• Watchdog timer
• 8-bit OSC1 timer
Maskable interrupts do not occur while PCLK is stopped. Interrupts are retained until the PCLK feed is re-
started.
Table B.1.1 shows a list of methods for clock control and starting/stopping the CPU.
Table B.1.1: Clock control list
Current
consumption
OSC1
OSC3
CPU (CCLK)
PCLK
peripheral
OSC1
peripheral
CPU stop
method
CPU startup
method
Low
Stop
Stop
Stop
Stop
Stop
Execute
slp
command
1
Oscillation
(system CLK)
Stop
Stop
Stop
Operation
Execute
halt
command
1, 2
Oscillation
(system CLK)
Stop
Stop
Operation
Operation
Execute
halt
command
1, 2, 3
Oscillation
Stop
Operation(1/1)
Operation
Operation
Oscillation
Oscillation
(system CLK)
Stop
Operation
Operation
Execute
halt
command
1, 2, 3
Oscillation
Oscillation
(system CLK)
Operation
(Low gear)
Operation
Operation
High
Oscillation
Oscillation
(system CLK)
Operation(1/1)
Operation
Operation
Canceling HALT and SLEEP modes (CPU startup methods)
1. Port startup
Started by input/output port interrupt factors or debug interrupts (ICD forced breaking). If the interrupt control-
ler or CPU IE flag blocks input/output port interrupts, the CPU executes commands following the
halt
or
slp
commands without accepting the interrupt. If interrupts are permitted and PCLK was running before the
halt
or
slp
commands were executed, the CPU branches to an interrupt processing routine. If PCLK was stopped
before the
halt
or
slp
commands were executed, branching to the interrupt processing routine is retained
until PCLK runs, even when interrupts are permitted.
2. OSC1 peripheral circuit startup
Started by clock timer, stopwatch timer, watchdog timer, or 8-bit OSC1 timer interrupt factors. If the interrupt
controller or CPU IE flag blocks these interrupts, the CPU executes commands following the
halt
command
without accepting the interrupt. If interrupts are permitted and PCLK was running before the
halt
command
was executed, the CPU branches to an interrupt processing routine. If PCLK was stopped before the
halt
command was executed, branching to the interrupt processing routine is retained until PCLK runs, even when
interrupts are permitted.
3. PCLK peripheral circuit startup
Started by PCLK peripheral circuit interrupt factors permitted by the interrupt controller. If the CPU IE flag is 0,
the CPU executes commands following the
halt
command, rejecting the interrupt. If the IE flag is 1, the CPU
branches to an interrupt processing routine.
Содержание S1C17001
Страница 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
Страница 31: ...3 MEMORY MAP AND BUS CONTROL 22 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 33: ...4 POWER SUPPLY VOLTAGE 24 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 63: ...6 INITERRUPT CONTROLLER 54 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 87: ...8 CLOCK GENERATOR CLG 78 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 91: ...9 PRESCALER PSC 82 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 133: ...11 16 BIT TIMER T16 124 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 185: ...14 8 BIT OSC1 TIMER T8OSC1 176 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 211: ...16 STOPWATCH TIMER SWT 202 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 219: ...17 WATCHDOG TIMER WDT 210 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 241: ...18 UART 232 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 277: ...20 I2 C 268 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 297: ...21 REMOTE CONTROLLER REMC 288 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 303: ...22 ON CHIP DEBUGGER DBG 294 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 313: ...25 PACKAGE 304 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...