Section 18 Power-Down Mode
Rev. 1.00 Oct. 01, 2007 Page 678 of 1956
REJ09B0256-0100
18.4 Sleep
Mode
18.4.1
Transition to Sleep Mode
Executing the SLEEP instruction when the STBY bit in STBCR is 0 causes a transition from the
program execution state to sleep mode. Although the CPU halts immediately after executing the
SLEEP instruction, the contents of the CPU registers remain unchanged. On-chip peripheral
modules continue to operate, and the clock output on the CLKOUT pin also continues. In sleep
mode, a high level is output to the STATUS1 pin and a low level to the STATUS0 pin.
18.4.2 Canceling
Sleep
Mode
Sleep mode is canceled by an interrupt (NMI, IRQ/
IRL
[7:0], or on-chip peripheral module
interrupt) or a reset.
Interrupts are accepted in sleep mode even when the BL bit in SR is 1. If necessary, save SPC and
SSR to the stack before executing the SLEEP instruction.
(1) Canceling
with
Interrupt
When an NMI, IRQ/
IRL
[7:0], or on-chip peripheral module interrupt occurs, sleep mode is
canceled and interrupt exception handling is executed. A code indicating the interrupt source is set
in INTEVT.
(2) Canceling
with
Reset
Sleep mode is canceled by a power-on reset caused by the
RESET
pin or watchdog timer overflow
or a manual reset.
Note: If an NMI interrupt is used to cancel sleep mode while the LCD is used, the NMIFL bit in
the NMIFCR register is set to 1 by the interrupt. This disables the LCD to access to the
VRAM used for the display data storage (DDR_SDRAM in area 3).
Moreover, as the LCDC continues to output data stored in the line buffer to the LCD panel
data pin, the LCD display will be stopped if the line buffer becomes empty. Accordingly,
an NMI interrupt should be disabled and the NMIFL bit should be cleared to 0 before the
line buffer becomes empty.
Summary of Contents for SH7763
Page 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
Page 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Page 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Page 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Page 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Page 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Page 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Page 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Page 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Page 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Page 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Page 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Page 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Page 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Page 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Page 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Page 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Page 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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