7 OSCILLATOR CIRCUIT (OSC)
S1C17001 TECHNICAL MANUAL
EPSON
55
7 Oscillator Circuit (OSC)
7.1 OSC Module Configuration
The S1C17001 incorporates two internal oscillator circuits (OSC3 and OSC1). The OSC3 oscillator circuit gener-
ates the main clock (max. 8.2 MHz) for high-speed operation of the S1C17 core and peripheral circuits. The OSC1
oscillator circuit generates a sub-clock (typ. 32.768 kHz) for timer and low-power operations.
The OSC3 clock is selected as the system clock after initial resetting.
Oscillator circuit on/off switching and system clock selection (between OSC3 and OSC1) is controlled by software.
External clock output is also possible.
Figure 7.1.1 illustrates the clock system and OSC module configuration.
OSC3
CCLK
OSC1
OSC1
FOUT3
output circuit
OSC3
oscillator circuit
(8.2 MHz)
OSC1
oscillator circuit
(32.768 kHz)
Division circuit
(1/1 to 1/4)
Wait circuit for
wakeup
Clock gear
(1/1 to 1/8)
Gate
S1C17 core
BCLK
Internal bus, RAM,
ROM
ITC, T16, T8F, UART,
SPI, I2C, T16E, P,
MISC, REMC,
Control register (CT,
SWT, WDT, T8OSC1)
PCLK
CLK_256Hz
OSC3
OSC4
Clock source
selection
System
clock
FOUT3
FOUT1
output circuit
FOUT1
Noise filter
RESET
OSC1
OSC2
SLEEP, on/off control
Gear selection
wakeup
HALT
On/off control
S1C17 core
S1C17 core
Division ratio
selection
Division circuit
(1/1 to 1/16K)
Division ratio selection
On/off control
On/off control
On/off control
SLEEP, on/off control
Noise filter
NMI
On/off control
CT, SWT, WDT
T8OSC1
Division
circuit
Gate
Gate
On/off control
On/off control
Gate
CLG
PSC
OSC
T8F, T16, T16E,
REMC, P, UART, SPI,
I2C
Gate
HALT
(1/1 to 1/32)
(1/128)
Figure 7.1.1: OSC module configuration
To reduce power consumption, control the clock in conjunction with processing and use standby mode. For more
information on reducing power consumption, refer to “Appendix B: Power Saving.”
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 ...