User Manual
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V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Telemetry
tlm_hilo_mark_sel
Source
3
I
OUT
Register
tlmX_hilo_mark_Y_clr
is used to clear current high and low stored values. Upon a clear:
•
The high register is reset to its minimum setting based on the format of the selected input; 0000h for
unsigned inputs and 1000h for signed inputs.
•
The low register is reset to the most positive setting based on the format of the selected input; 1FFFh for
unsigned inputs and 0FFFh for signed inputs.
The current high and low stored values are available on read-only registers
tlmX_out_hi_Y
and
tlmX_out_lo_Y
respectively.
8.13
Telemetry registers
The relevant telemetry registers and their descriptions are provided in
Table 61
Telemetry-related register descriptions
Peripheral Field name
Access Address
Bits
Description
telem
tlm_kfp_duty
RW
7000_3400h
(Loop 0)
7000_3800h
(Loop 1)
[5:0]
Duty cycle telemetry LPF coefficient
index. Note that exp. settings
greater than 9 are clamped to 9. Set
to 63 to bypass filter.
kfp_exp = tlm_kfp_duty[5:2]
kfp_man = 4 + tlm_kfp_duty[1:0]
kfp = kfp_man * 2^kfp_exp * 2^-13
F3db(kHz) = [kfp / (1 - kfp)] *
F
switch
(kHz) / 2*pi
telem
tlm_iin_est_alpha
RW
7000_3400h
(Loop 0)
7000_3800h
(Loop 1)
[11:0]
Input current estimate alpha
coefficient. Defines the relative
contributions of V
OUT
/V
IN
and duty
cycle in the computation of the
input current estimate.
I
IN_est
= I
OUT
* [(1-alpha)*V
OUT
/V
IN
+
alpha*Duty*tlm_transformer_scale
_loop]
where tlm_transformer_scale_loop
represents the V
RECT
/V
IN
ratio and is
defined below
LSB = 0.015625, range = 0.0 to
0.984375
telem
tlm_iin_src_sel
RW
7000_3400h
(Loop 0)
7000_3800h
(Loop 1)
[13:12] Input current telemetry source
select.
0: Measured on ISEN input
1: Measured on BISEN input
2 to 3: Estimated input curent
telem
tlm_kfp_iin
RW
7000_3400h
(Loop 0)
[19:14] Input current telemetry LPF
coefficient index. Note that exp.
settings greater than 9 are clamped
