6.4 Device Functional Modes

6.4.1 Test Procedures for Functional Tests

This section outlines the specific test procedures used to obtain the parameters listed in the Functional Tests

section of the data sheet.

6.4.1.1 Multiple Target Configurations

This test verifies the operation of the TMF0064 in a multi-drop use case. Ensure that the host can communicate

with multiple devices on the SDQ bus. Verify that the presence of other DUTs does impact communication to the

selected DUT.

HOST

RPUP: 500Ω

VPUP: 3.13V to 5.25V

Target 1

SDQ

GND

Target 2

SDQ

GND

Target 3

SDQ

GND

Cable cap

1.7nF

Figure 6-6. Multiple Target Configuration

Successful communication implies executing the following sequence of instructions without failure:

1. Issue RESET in standard speed and check for a presence pulse.

2. Issue SEARCH ROM command to identify the IDs of targets on the SDQ bus.

3. Issue RESET in standard speed and check for presence pulse.

4. Select one of the targets by issuing MATCH ROM command with the specific ID of the target identified from

the SEARCH ROM command.

5. Issue MEMORY Commands to program or read from the memory.

6. Repeat steps 3, 4, and 5 for other target devices on the SDQ bus.

6.5 Programming

6.5.1 Serial Communication

The host reads, programs, or checks the status of the TMF0064 through the command structure of the SDQ

interface as shown in Figure 6-7. The command structure includes ROM and MEMORY commands.

TMF0064

SLVSJQ6 – SEPTEMBER 2025

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