CH1_IN
PVSS
PVSS
PVCC
CH0_IN
CH0_OUT
CH1_OUT
PHY
PPG or
PPG_A
ASQ
UUPS
PGA
SD 12 or 14
MOD
Filter
Bias Generator
on SAPH_A only
GPIO
(software controlled)
Optional
external
signal
handling
Vout
OSC
PLL
USSXTIN USSXTOUT
USSXT_BOUT
USSXT
HSPLL
SAPH or SAPH_A
SDHS
DTC
RAM
(shared with LEA)
USS or USS_A module
PLL_CLK
Px.y
XPB0
XPB1
Introduction
459
SLAU367P – October 2012 – Revised April 2020
Copyright © 2012–2020, Texas Instruments Incorporated
Universal USS Power Supply (UUPS)
19.1 Introduction
The Universal USS Power Supply (UUPS) is one of the submodules in the Ultrasonic Sensing Solution
(USS) module. The USS module is designed for ADC-based ultrasonic sensing technology in various
measurement applications.
shows the block diagram of the USS module.
Figure 19-1. USS/USS_A Block Diagram
The UUPS module consists of three blocks: the power sequencer (PSQ), the reference generator
(BIAS_REF), and the USS LDO (see
).
•
PSQ block: Controls the power-up and power-down sequences of the USS module.
•
BIAS_REF block: Generates required reference voltages and currents for the
,
, and USS
LDO.
•
USS_LDO block: Generates regulated 1.6 V, which is used by the USS submodules.