Power, Reset, and Clock Management
8.1.13.5.4 PRM_SRAM_COUNT Register (offset = Ch) [reset = 78000017h]
PRM_SRAM_COUNT is shown in
and described in
Common setup for SRAM LDO transition counters. Applies to all voltage domains. [warm reset insensitive]
Figure 8-182. PRM_SRAM_COUNT Register
31
30
29
28
27
26
25
24
StartUp_Count
R/W-78h
23
22
21
20
19
18
17
16
SLPCNT_VALUE
R/W-0h
15
14
13
12
11
10
9
8
VSETUPCNT_VALUE
R/W-0h
7
6
5
4
3
2
1
0
Reserved
PCHARGECNT_VALUE
R-0h
R/W-17h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 8-201. PRM_SRAM_COUNT Register Field Descriptions
Bit
Field
Type
Reset
Description
31-24
StartUp_Count
R/W
78h
Determines the start-up duration of SRAM and ABB LDO.
The duration is computed as 16 x NbCycles of system clock cycles.
Target is 50us.
23-16
SLPCNT_VALUE
R/W
0h
Delay between retention/off assertion of last SRAM bank and
SRAMALLRET signal to LDO is driven high.
Counting on system clock.
Target is 2us.
15-8
VSETUPCNT_VALUE
R/W
0h
SRAM LDO rampup time from retention to active mode.
The duration is computed as 8 x NbCycles of system clock cycles.
Target is 30us.
7-6
Reserved
R
0h
5-0
PCHARGECNT_VALUE
R/W
17h
Delay between de-assertion of standby_rta_ret_on and
standby_rta_ret_good.
Counting on system clock.
Target is 600ns.
729
SPRUH73H – October 2011 – Revised April 2013
Power, Reset, and Clock Management (PRCM)
Copyright © 2011–2013, Texas Instruments Incorporated