EPCQ-A Serial Configuration Device Datasheet

ID 683818
Date 10/01/2019
Public
Document Table of Contents

1.9.6. Read Silicon Identification Operation (ABh)

This operation reads the 8-bit silicon ID of the EPCQ-A device from the DATA1 output pin. If this operation is shifted in during an erase or write cycle, it is ignored and does not affect the cycle that is in progress.

Note: This operation is applicable to EPCQ4A, EPCQ16A and EPCQ64A devices only.

The device implements the read silicon ID operation by driving the nCS signal low and then shifting in the read silicon ID operation code, followed by three dummy bytes on the DATA0 pin. The 8-bit silicon ID of the EPCQ-A device is then shifted out on the DATA1 pin at falling edges of the DCLK signal. The device can terminate the read silicon ID operation by driving the nCS signal high after reading the silicon ID at least one time. Sending additional clock cycles on DCLK while nCS is driven low can cause the silicon ID to be shifted out repeatedly.

Table 23.  EPCQ-A Silicon Identification
EPCQ-A Device Silicon ID (Binary Value)
EPCQ4A b'0001 0010
EPCQ16A b'0001 0100
EPCQ64A b'0001 0110
Figure 11. Read Silicon Identification Operation Timing Diagram

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