M95P16-IXCSSLASHEF datasheet(24/63 Pages) STMICROELECTRONICS

24 / 63 page

6.5

Clear Safety register (50h)

The Clear Safety register (CLRSF) instruction resets all the bits of the Safety register.

This instruction is entered (without address) by driving S low, shifting the instruction code 50h into the Data input

(D) pin on the rising edge of C. The instruction is completed by driving S high.

As soon as S goes high, the device resets immediately all volatile bits of the Safety register.

The S pin must be driven high after the eighth bit has been latched. If this is not done the instruction is not

executed.

Figure 11. Clear Safety register

CLRSF instruction

-3

-2

-1

High impedance

MS54397V1

6.6

Read Volatile register (85h)

The Read Volatile register (RDVR) instruction is used to read the 8-bit Volatile register.

The instruction is entered by driving S low and shifting the instruction code 35h into the D pin on the rising edge

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

driving S high.

The Read Volatile register instruction can be used at any time, even while a Program, Erase or Write Status

Refer to Status, Configurable, Safety, Volatile and SFDP registers for the register description.

Figure 12. Read Volatile register

-3

-2

-1

High impedance

RDVR instruction

Volatile byte

MS55403V1

M95P16-I M95P16-E

Clear Safety register (50h)

DS13710 - Rev 1

page 24/63

M95P16-IXCS/EF Datasheet(PDF) 24 Page - STMicroelectronics