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4.2 Memory Interface
4.2.1 QSPI Interface
The TMDS273GMEVM board has a 64 Mbit QSPI memory device (GD25B64CWAG from GigaDevice), which is
connected to the MSS_QSPI interface of the AM273x SoC. This flash device is primarily meant to store the boot
image, but can also serve as storage for other data if another boot mode is used.
4.2.2 Board ID EEPROM
The AM273x EVM is a 2 Kbit I2C EEPROM for board ID information. The board ID memory is configured to
respond to I2C address 0x50. This EEPROM (CAV24C02WE-GT3 from Onsemi) interfaces with the SoC via the
MSS_I2CA port.
As seen in
Figure
4-3, pins WP is allowed to float while A0, A1, and A2 are pulled to ground. These pins are
pulled low internally. Pins A0, A1, and A2 configure the device address. The WP pin is the Write Protect input.
When pulled high, this pin prevents write operations.
SPRUIY1B – NOVEMBER 2020 – REVISED FEBRUARY 2024
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Figure 4-2. QSPI Interface
Figure 4-3. Board ID EEPROM
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Hardware Description
AM273x Evaluation Module
15
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