User Manual
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V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Telemetry
8
Telemetry
This chapter discusses the telemetry module and its submodules and their operation. The relevant register
settings and PMBus commands are also provided.
The main function of the telemetry module is to provide source selection and low-pass filtering of HW-sensed
parameters (V
OUT
, I
OUT
, V
IN
, I
IN
, temperature, duty cycle and frequency) for use by the FW in generating the
equivalent PMBus READ commands (READ_VOUT, READ_IOUT, etc.).
In addition, the telemetry module supports programmable interrupt generation and watermark detection. The
following sections describe the various telemetry submodules.
8.1
Output voltage (V
OUT
) telemetry
The V
OUT
telemetry submodule block diagram is shown in
. Its input is received from the VSP module.
This input is low-pass filtered at a programmable BW, determined by register
tlmX_kfp_vout
(where X = 0, 1 for
Loop 0, 1). The BW programming via
tlmX_kfp_vout
is given in
Figure 65
Output voltage telemetry block diagram
Table 50
V
OUT
LPF BW programming
tlm_kfp_vout kfp
kfp_real
F3db (kHz) tlm_kfp_vout kfp
kfp_real
F3db (kHz)
0
4
0.0001
0.97
16
64
0.0020
15.57
1
5
0.0002
1.21
17
80
0.0024
19.48
2
6
0.0002
1.46
18
96
0.0029
23.38
3
7
0.0002
1.70
19
112
0.0034
27.29
4
8
0.0002
1.94
20
128
0.0039
31.21
5
10
0.0003
2.43
21
160
0.0049
39.05
6
12
0.0004
2.92
22
192
0.0059
46.90
7
14
0.0004
3.40
23
224
0.0068
54.77
8
16
0.0005
3.89
24
256
0.0078
62.66
9
20
0.0006
4.86
25
320
0.0098
78.48
10
24
0.0007
5.83
26
384
0.0117
94.36
11
28
0.0009
6.81
27
448
0.0137
110.31
12
32
0.0010
7.78
28
512
0.0156
126.31
13
40
0.0012
9.73
29
640
0.0195
158.52
tlmX_kfp_vout[5:0]
vspX_vout_fs[11:0]
U12.0
LPF
50 MHz
U12.3
F
SWITCH
U6.10
F
SWITCH
tlmX_vout_convert_factor[20:0]
U-3.24
U9.27
Clamp U6.10
To:
- READ_VOUT
- Fault module
To:
- I
IN
estimate
- Current sense
RW parameters
RO parameters
tlmX_vout_fsw[14:0]
tlmX_vout_fsw_1v[15:0]
D
Q
Q
SET
CLR
D
Q
Q
SET
CLR
X
