5 POWER-DOWN CONTROL
S1C33L03 PRODUCT PART
EPSON
A-67
A-1
A-5
The same clock source must be used for the prescaler operating clock and the CPU operating clock. Therefore,
when operating the CPU in low-speed with the OSC1 clock, the prescaler input clock must be switched
according to the CPU operating clock. In this case, in order to prevent a malfunction in the peripheral circuit,
the prescaler should be turned off before switching the CPU operating clock. After the CPU operating clock
has been switched, switch the prescaler operating clock and then turn the prescaler on.
Function
Control bit
"1"
"0"
Default
Prescaler operating clock
switch over
PSCDT0 (D0)/Prescaler clock select register(0x40181) OSC1
OSC3/
PLL
OSC3/
PLL
Power-down control of the LCD controller
The LCD controller provides the power save mode on its own. Since the power save mode can be controlled
by software, set the mode when turning the LCD display off.
Function
Control bit
"11"
"00"
Default
Power save mode
LPSAVE[1:0] D([1:0])/LCDC mode register 2
(0x39FFE3)
Normal
operation
Power
save mode
Power
save mode
Note: The power save mode switches the LCD panel power control signal (LCDPWR) to the inactive state.
This may cause damage of the LCD panel if the clock supply to the LCD controller is stopped at the
same time.
Therefore, do not stop the clock supply for 1 frame cycles or more after setting the LCD controller to
power save mode.
Содержание CMOS 32-Bit Single Chip Microcomputer S1C33L03
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Страница 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
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Страница 163: ...S1C33L03 FUNCTION PART II CORE BLOCK ...
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Страница 166: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 172: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 176: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 224: ...II CORE BLOCK BCU Bus Control Unit B II 4 48 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 250: ...II CORE BLOCK ITC Interrupt Controller B II 5 26 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 262: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 263: ...S1C33L03 FUNCTION PART III PERIPHERAL BLOCK ...
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Страница 322: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 414: ...III PERIPHERAL BLOCK INPUT OUTPUT PORTS B III 9 26 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Страница 415: ...S1C33L03 FUNCTION PART IV ANALOG BLOCK ...
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Страница 435: ...S1C33L03 FUNCTION PART V DMA BLOCK ...
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Страница 493: ...S1C33L03 FUNCTION PART VI SDRAM CONTROLLER BLOCK ...
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Страница 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
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