17. Power-Down Mode
Rev.1.00 Jan. 10, 2008 Page 796 of 1658
REJ09B0261-0100
17.6
Module Standby Functions
This LSI supports the module standby state, where the clock supplied to on-chip modules is
stopped.
17.6.1
Transition to Module Standby Mode
By setting the MSTP bits in MSPTCR, the clock supply can be stopped to the corresponding
module*.
In each module that is in the module standby state, the state right before transition to module
standby state is retained. After register setting, the state right before stop is retained. The state of
the external pin is retained. When the module is released from the module standby state, the
module resumes operation.
SSI, HSPI, HAC, and MMCIF are initialized by a manual reset even if they are in the module
standby state. Confirm that the operation of GDTA is completed before putting GDTA and
DMAC in the module standby state.
Note: * For details of the description of the individual MSTP bits in the standby control
registers, see section 17.3.2, Standby Control Register 0 (MSTPCR0) and 17.3.3,
Standby Control Register 1 (MSTPCR1).
The MSTP bits should be set to 1 while the module is in the idle state after completing
its operation and there is no possible activation sources from external pins or other
modules.
17.6.2
Releasing Module Standby Functions
The module standby functions are released by clearing the MSTP bits in MSTPCR0 to 0 or a
power-on reset.
Summary of Contents for SH7781
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Page 74: ...2 Programming Model Rev 1 00 Jan 10 2008 Page 44 of 1658 REJ09B0261 0100 ...
Page 272: ...8 Caches Rev 1 00 Jan 10 2008 Page 242 of 1658 REJ09B0261 0100 ...
Page 376: ...10 Interrupt Controller INTC Rev 1 00 Jan 10 2008 Page 346 of 1658 REJ09B0261 0100 ...
Page 694: ...13 PCI Controller PCIC Rev 1 00 Jan 10 2008 Page 664 of 1658 REJ09B0261 0100 ...
Page 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Page 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Page 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Page 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Page 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Page 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Page 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Page 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Page 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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