M25PX32-VMP6F datasheet(36/63 Pages) STMICROELECTRONICS

номер детали	M25PX32-VMP6F

подробное описание детали	32-Mbit, dual I/O, 4-Kbyte subsector erase, serial Flash memory with 75 MHz SPI bus interface

PDF	63 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

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Instructions

M25PX32

36/63

6.10

Read OTP (ROTP)

The device is first selected by driving Chip Select (S) Low. The instruction code for the Read

OTP (ROTP) instruction is followed by a 3-byte address (A23- A0) and a dummy byte. Each

bit is latched in on the rising edge of Serial Clock (C).

Then the memory contents at that address are shifted out on Serial Data output (DQ1).

Each bit is shifted out at the maximum frequency, fCmax, on the falling edge of Serial Clock

(C). The instruction sequence is shown in Figure 17.

The address is automatically incremented to the next higher address after each byte of data

is shifted out.

There is no rollover mechanism with the Read OTP (ROTP) instruction. This means that the

Read OTP (ROTP) instruction must be sent with a maximum of 65 bytes to read, since once

the 65th byte has been read, the same (65th) byte keeps being read on the DQ1 pin.

The Read OTP (ROTP) instruction is terminated by driving Chip Select (S) High. Chip Select

(S) can be driven High at any time during data output. Any Read OTP (ROTP) instruction

issued while an Erase, Program or Write cycle is in progress, is rejected without having any

effect on the cycle that is in progress.

Figure 17.

Read OTP (ROTP) instruction and data-out sequence

A23 to A7 are Don't care.

≤ n ≤ 65.

DQ0

AI13573

DQ1

3456789 10

28 29 30 31

22 21

3210

High Impedance

Instruction

24-bit address

DQ0

DQ1

32 33 34

36 37 38 39 40 41 42 43 44 45 46

765432

DATA OUT 1

Dummy byte

MSB

6543210

DATA OUT n

MSB

765432

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