Precautions - Epson S1C17001 Technical Manual

8.5 Precautions

(1) The default settings enable PCLK feed to peripheral modules. To reduce power consumption, stop the clock
feed if the peripheral modules listed below are not used.
Peripheral modules operated using PCLK
• Prescaler (PWM & capture timer, remote controller, P port)
• UART
• 8-bit timer
• 16-bit timer Ch.0 to 2
• Interrupt controller
• SPI
• I 2 C
• P port & port MUX
• PWM & capture timer
• MISC register
• Remote controller
Since the following peripheral modules are not operated using PCLK except for control register access, PCLK
is not required after setting the control register to start operations.
• Clock timer
• Stopwatch timer
• Watchdog timer
• 8-bit OSC1 timer
(2) Do not set PCKEN[1:0] (D[1:0]/CLG_PCLK register) to 0x2 or 0x1, since doing so will stop the operation of
certain peripheral modules.
∗ PCKEN[1:0]: PCLK Enable Bits in the PCLK Control (CLG_PCLK) Register (D[1:0]/0x5080)
S1C17001 TECHNICAL MANUAL
EPSON
8 CLOCK GENERATOR (CLG)
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