CH0OUT
CH1OUT
SAPHPGCTL.
PGSEL
0
1
0
1
Excitation Pulse
Stop Pulse
Polarity
Controller
Extra Excitation (PPG_A)
SAPHPGC,SAPH_AXPGCTL,
SAPHPGLPER,SAPHPGHPER,
SAPH_AXPGLPER,SAPH_AXPGHPER
Registers
Counters
00
01
10
11
SAPHPGCTL.
TRSEL
SAPHPPGTRIG.
PPGTRIG
from ASQ
External Signal
External Signal
SAPHPGCTL.
STOP
SAPHPGCTL.
TONE
Trigger
SAPHPGCTL.PPGEN
PLL CLK
from
ASQ
SAPH
PG
C
T
L
.
PPG
C
H
SEL
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
Programmable Pulse Generator (PPG or PPG_A) Block
497
SLAU367P – October 2012 – Revised April 2020
Copyright © 2012–2020, Texas Instruments Incorporated
Sequencer for Acquisition, Programmable Pulse Generator, and Physical
Interface (SAPH, SAPH_A)
Figure 21-1. USS or USS_A Block Diagram
21.2 Programmable Pulse Generator (PPG or PPG_A) Block
shows the conceptual block diagram of the programmable pulse generator (PPG). In italics
the extended elements of PPG_A.
Figure 21-2. PPG or PPG_A Block Diagram