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IVA2.2 Subsystem Register Manual
5.5.2 SYS Registers
This section provides information about the SYS Module. Each register in the module is described
separately below.
5.5.2.1
SYS Register Mapping Summary
Table 5-48. SYS Register Summary
Register Name
Type
Register Width
Address Offset
Physical Address
(Bits)
RW
32
0x0000 0000
0x0181 0000
R
32
0x0000 2000
0x0181 2000
5.5.2.2
SYS Register Descriptions
Table 5-49. PDCCMD
Address Offset
0x0000 0000
Physical address
0x0181 0000
Instance
IVA2.2 GEMSYS
Description
Power-Down Command Register
Type
RW
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Reserved
GEMPD
EMCLOG
PMCLOG
UMCLOG
DMCLOG
EMCMEM
PMCMEM
UMCMEM
DMCMEM
Bits
Field Name
Description
Type
Reset
31:17
Reserved
Write 0s for future compatibility.
RW
0x0000
Read returns 0.
16
GEMPD
Power-down during IDLE:
RW
0
GEMPD = 0: Normal operation. Do not power-down CPU or DSP megamodule
when CPU is IDLE.
GEMPD = 1: Sleep mode. Power-down CPU and DSP megamodule when
CPU enters IDLE state
15:14
EMCMEM
SRAM Sleep Modes
RW
0x1
Determines the RAM sleep modes used by the EMC for powering-down
internal memories.
0x0:
No sleep mode supported
0x1:
Sleep mode 1
Write 0x2:
Sleep mode 2 - equivalent to sleep mode 1
Write 0x3:
Sleep mode 3 - equivalent to sleep mode 1
13:12
EMCLOG
Logic Clock Gating Modes.
RW
0x1
Determines to what degree the EMC gates its clockinternally.
0x0:
No clock gating supported beyond leaf clock gating.
0x1:
Static clock gating of unused modulesregions when DSP
megamodule is active(pmc_pd_pdstat[1:0] = 00) and Static
clock gating when DSP megamodule is in standby
(pmc_pd_pdstat[1:0] = 11)
11:10
UMCMEM
SRAM Sleep Modes
RW
0x1
Determines the RAM sleep modes used by the UMC for powering-down L2
pages.
0x0:
No sleep mode supported
0x1:
Sleep mode 1
Write 0x2:
Sleep mode 2 - equivalent to sleep mode 1
813
SWPU177N – December 2009 – Revised November 2010
IVA2.2 Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated