Samsung S5PC100 User Manual page 285

S5PC100 USER'S MANUAL (REV1.0)
3.2 HPM STRUCTURE AND CLOSED-LOOP BEHAVIOR
When IEM works with closed-loop, HPM and APC1 work like as Figure 2.5-4 and Figure 2.5-5.
HPM
hpm_targetclk_c
creset0
sample_en
pre_delay_in
delayline_end
hpm_delay_code
RCC table
APC_PL1_CALCODE
APC_PL2_CALCODE
APC_PL3_CALCODE
APC_PL4_CALCODE
APC_PL5_CALCODE
APC_PL6_CALCODE APC_PREOFFSET
APC_PL7_CALCODE
APC_PL8_CALCODE
Figure 2.5-4 IEM Closed-loop Voltage Generation Flow in HPM and APC1
0_0110
B
A
A
A-B
Minimum
(A+B,
1_1111)
slack_reg
B
[5:0]
integral_reg[20:0] ([20:14]=closedloop_vdd)
integral =
((integral > 22'h1F_C000)
integral_reg +
& (gained_slack > 0)
integral
((integral ≤ APC_MINVDD_LIMIT)
& gained_slack < 0)
A
A==0
Sign
extender
sd_saturation
gained_slack[15:0] Shifter
Sign
ext_slack[15:0]
extender
(A[5:2] == 4'hF)
A
| (A[5:2] == 4'h0)
vdd_stable
step_upward
INTELLIGENT ENERGY MANAGEMENT
rst_filterq |
21'h1F_C000
& (integral > 0))
integral_reg[20:14] =
APC_MINVDD_LIMIT
| (integral < 0)
filter_en integral[20:0]
loop_gain
APC_SS_GAIN_EN
vdd_stable
APC_SAT_GAIN_EN
& sd_saturation
& step_upward
APC_UP_GAIN_EN
& step_upward
APC_LOW_GAIN_EN
sd_low
& sd_low
Default
&
APC_GAIN_SEL
APC_IGAIN3
APC_IGAIN2
APC_IGAIN4
APC_IGAIN1
2.5-13