M95P16-EXCSSLASHEF datasheet(23/63 Pages) STMICROELECTRONICS

23 / 63 page

6.3

Read Status register (05h)

The Read Status register (RDSR) instruction is used to read this 8-bit register, whose content is described in

Section 5.1 Status register. The instruction is entered by driving S low and shifting the instruction code 05h into

the D pin on the rising edge of C. The register bits are then shifted out (MSB first) on the Q pin, on the falling edge

of C, as shown in Figure 9.

Figure 9. Read status register

-3

-2

-1

High impedance

RDSR instruction

Status register content

MS55401V1

This instruction can be used at any time, even while a Program, Erase or Write Status register cycle is in

progress. The WIP status bit can be checked to determine when the cycle is complete, and if the device is

ready to accept another instruction. The Status register can be read continuously in loop mode. The instruction is

completed by driving S high.

6.4

Read Configuration and Safety registers (15h)

The Read Configuration and Safety registers (RDCR) instruction reads the two Configuration and Safety register

bytes (one for each register). It is sent without an address, and the device first outputs the Configuration register

byte, followed by the Safety register byte, in loop mode.

The instruction is entered by driving S low, and shifting the instruction code 15h into the D pin on the rising edge

of C. The Configuration and Safety register bit values are then shifted out (MSB first) on the Q pin, on the falling

edge of C as shown in Figure 10. The Configuration and Safety registers can be read continuously.

The instruction is completed by driving S high.

Figure 10. Read Configuration and Safety registers

-3

-2

-1

High impedance

RDCR instruction

Configuration byte

Safety byte

MS55402V1

The content of Configuration and Safety registers is described in Section 5.2 Configuration and Safety register

format.

M95P16-I M95P16-E

Read Status register (05h)

DS13710 - Rev 1

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