Texas Instruments J721EXSOMXEVM, User Manual

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J721ESOM
PG-USON-8-1
Footprint
I2C0_SCL
I2C0_SDA
APPLE_AUTH_RSTz
From GPIO
Expander
3.3 V
NC
NC
NC
NC
NC
3.3 V
1 2
3
5 6
7 8
9 10
4
Option
±
1
Option
±
2
DNI
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J721E EVM Hardware Architecture
73 SPRUIS4A – December 2019 – Revised May 2020
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Jacinto7 J721E/DRA829/TDA4VM Evaluation Module (EVM)
4.23 Apple Authentication Header
The common processor board has a provision to support Apple authentication interface. In the J721E
EVM, the Apple authentication board can be interfaced with J721E SoC in two options: one is module
interface and the other is device interface.
Figure 57. Apple Authentication Block Diagram
Module Interface:
Common Processor board have a 2.54 mm Dual row 10 Pin Receptacle Mfr. Part# 2214BR-10G.
I2C0 Port of J721E SoC and Reset from GPIO Expander is terminated to this connector. 3.3 V supply is
provided to the connector J9.
Table 42 lists detailed signal and pin descriptions.
Table 42. APPLE AUTH Header J9 Pinout
Pin
No Signal Description
1 I2C0_SCL I2C slave interface, clock connection
3 I2C0_SDA I2C slave interface, data connection
8 APPLE_AUTH_RSTz Reset, Active low
5 VSYS_IO_3V3 Power 3.3 V
2 DGND Ground
4,6,7,
9,10
NC Not Connected