Samsung S5PC110 Manual page 455

S5PC110_UM
5.5.3.13 APC Undershoot Threshold and Noise Limit Register (APC_UNSHT_NOISE, R/W, Address =
0xE070_0034)
APC_UNSHT_NOISE
Reserved
Noise Limit for VDDOK
Undershoot Threshold
Level
5.5.3.14 Wakeup Delay Register (APC_WKUP_DLY, R/W, Address = 0xE070_0038)
APC_WKUP_DLY
Wakeup Delay
5.5.3.15 Slack Sample Count Register (APC_SLK_SMP, R/W, Address = 0xE070_003C)
APC_SLK_SMP
Reserved
Slack Sample Count
Bit
[7:6] Read undefined. Write as zero.
[5:4] Noise limit for the VDDOK generation due to the power
supply regulation errors. Provides the acceptable
integrated eHPM (+ve) below the RCC value for updating
the performance level in the closed-loop mode.
APC_UNSHT_NOISE[5:4]
[3:0] This is the threshold level for the detection of voltage
undershoot interrupt on the voltage slew. The value
programmed is the amount of eHPM (+ve) allowed after
reaching the optimum core voltage for the safe SoC
operation.
Bit
[7:0] Count for the wakeup delay.
Bit
[7:6] Read undefined. Write as zero.
[5:0] The time period for each count in the vddchkd and the
vddchk counters during the performance level change:
* set to 0x1D for 2μs when theapc_refclk_c clock is
15MHZ
* set to 0x3B for 2μs when the apc_refclk_c clock is
30MHZ.
5 INTELLIGENT ENERGY MANAGEMENT
Description
Accumulated eHPM
00
01
10
11
Description
Description
Initial State
Minimum
0
4
16
31
Initial State
Initial State
0
0x0
0x0
0x00
0
0x00
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