Table A-3. E2 Termination Resistor Location Table; Table A-4. E2 Buck Converter Table; Table A-5. E2 Hsec Connector Mapping - Texas Instruments AM263 Series User Manual

E2 Design Changes
5. Added additional series termination resistors.
a. 33Ω resistors were placed for the XDS110 TMS and TCK signals at the output of an isolation buffer
(U49). One 33Ω resistor was placed for the XDS110 TDI signal on the OUTA of an isolation buffer (U53).
b. Series terminations resistors were places on outputs of three isolation buffers to better control edge
overshoot/undershoot.
Isolation Buffer Output Pin
U45.2
U49.6
U49.7
U53.2
6. DC-DC converter solution components updated.
a. The DC-DC buck converters responsible for generating the 3.3V rail and 1.2V rail were both replaced
with the TSP62913RPUR buck converter.
DC-DC Conversion
5V->3.3V
3.3V->1.2V
7. Updated passive components.
a. C136 and C1861 were replaced with 0805 from 1210
b. L3 and L4 were replaced with IHLP2020BZER1R0M01 from 744316100
8. Changed HSEC ADC Connections.
HSEC Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
54 AM263x Control Card Hardware User's Guide

Table A-3. E2 Termination Resistor Location Table

Signal Name
UART0_RXD
XDS110_TCK_ISO
XDS110_TMS_ISO
XDS110_TDI_ISO

Table A-4. E2 Buck Converter Table

E1 Buck Converter
TPS54334DRCT
TPS62826DMQR

Table A-5. E2 HSEC Connector Mapping

E1 Signal
NC
NC
TMS
NC
TCK
TDO
GND
TDI
DAC_OUT
GND
ADC0_AIN0_P
ADC0_AIN0_n
GND
ADC0_AIN1_p
ADC0_AIN1_n
GND
ADC0_AIN2_p
ADC0_AIN2_n
GND
ADC1_AIN0_p
Copyright © 2023 Texas Instruments Incorporated
Series Termination Resistor Value
33Ω
33Ω
33Ω
33Ω
E2 Buck Converter
TPS62913RPUR
TPS62913RPUR
E2 Signal
NC
NC
TMS
NC
TCK
TDO
GND
TDI
ADC0_AIN0/DAC_OUT
GND
ADC0_AIN1/DAC_OUT
ADC1_AIN0
GND
ADC1_AIN1
ADC0_AIN2
GND
ADC0_AIN3
ADC1_AIN2
GND
ADC1_AIN3
SPRUJ09C – MARCH 2022 – REVISED FEBRUARY 2023
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