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SPRUIF8 – June 2017
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Copyright © 2017, Texas Instruments Incorporated
AM438x ePOS EVM Hardware
User's Guide
SPRUIF8 – June 2017
AM438x ePOS EVM Hardware
This document describes the hardware architecture of the AM438x evaluation module (EVM), part number
TMDXEVM438x, which is based on the Texas Instruments AM438x processor. This EVM is also
commonly known as the AM438x Electronic Point of Sale (ePOS) EVM.
Contents
1
Description
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3
2
System View
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3
3
Functional Blocks Description
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5
3.1
Processor
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5
3.2
Clocks
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6
3.3
Reset Signals
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6
3.4
Memories Supported
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6
3.5
SDMMC0
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6
3.6
10/100 Ethernet
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6
3.7
USB
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7
3.8
Connectivity
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7
3.9
UART
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7
3.10
ADC
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7
3.11
Smart Card
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7
3.12
Camera
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7
3.13
Audio
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7
3.14
Printer Header
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7
3.15
Magnetic Stripe Reader
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8
4
Power Supplies
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8
4.1
Power Source
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8
4.2
Power Sequencing
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8
4.3
Power-Management IC Power Supplies
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8
4.4
APM Sense Resistors
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9
5
Configuration and Setup
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9
5.1
Boot Configuration
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9
5.2
I2C Address Assignments
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10
5.3
I2C ID Memory
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10
5.4
JTAG
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10
6
User Interfaces
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11
6.1
Keypad
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11
6.2
LEDs
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11
6.3
Audio Buzzer
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11
6.4
Display
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11
7
Pin Use Description
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11
7.1
Functional Interface Mapping
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11
8
Board Connectors
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12
8.1
SDMMC0 – J10
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12
8.2
LCD Connector – J44
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12
8.3
Touch Connector – J45
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14
8.4
Ethernet – J8
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14
8.5
USB
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14
8.6
Camera Interface Header – J15
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