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User Manual
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2021-08-25
XDPP1100 technical reference manual
Digital power controller
Telemetry sense
•
ptat_temp_trim
= 0
A register,
temp_min
, is provided to clamp the minimum computed internal temperature. The default setting
for this parameter is -128°C. After the clamp, the internal temperature is low-pass filtered at a fixed BW of 0.48
kHz. This filtered version of the internal temperature may be read directly via read-only register
int_temp
.
Alternatively, the itsen_adc data is available directly through the following registers:
•
ts_itsen_adc
•
tlm_itsen_fs
•
Filtered through parameter
tlm_itsen_lpf
(see
Either may be read by FW for a user-specific computation of internal temperature.
4.4.5
X-valent measurement
The last submodule of the TSP is X-valent (XV) measurement, providing a HW-controlled method to measure
and decode the resistor-programmed pinset on the XADDR1, two pins. The XV measurement is enabled through
the registers
xv_pinset1_meas
for XADDR1 and
xv_pinset2_meas
for XADDR2. When enabled, the XV
measurement occurs during the boot under the following conditions:
•
Subsequent to the trim parameter OTP download
•
Prior to the configuration parameter and PMBus OTP download
Two fixed LUTs are provided and selected through register
xv_decode_sel
according to the following
definitions:
•
xv_decode_sel
= 0 selects the eight-value table shown in
•
xv_decode_sel
= 1 selects the 16-value table shown in
Table 21
8-value XADDR decode
XADDR resistance (
Ω
)
Eight-value XADDR decode
1200
7
1800
6
2700
5
3900
4
6800
3
10000
2
18000
1
47000
0
Table 22
16-value XADDR decode
XADDR resistance (
Ω
)
16-value XADDR decode
780
15
1100
14
1500
13
2020
12
2700
11
3520
10