M45PE10-VMP6TP datasheet(21/47 Pages) NUMONYX

21 / 47 page

M45PE10

Instructions

21/47

Figure 9.

Read status register (RDSR) instruction sequence and data-out sequence

6.5

Read data bytes (READ)

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

data bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being

latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that

address, is shifted out on serial data output (Q), each bit being shifted out, at a maximum

frequency fR, during the falling edge of Serial Clock (C).

The instruction sequence is shown in Figure 10.

The first byte addressed can be at any location. The address is automatically incremented

to the next higher address after each byte of data is shifted out. The whole memory can,

therefore, be read with a single read data bytes (READ) instruction. When the highest

address is reached, the address counter rolls over to 000000h, allowing the read sequence

to be continued indefinitely.

The read data bytes (READ) instruction is terminated by driving Chip Select (S) High. Chip

select (S) can be driven High at any time during data output. Any read data bytes (READ)

instruction, while an erase, program or write cycle is in progress, is rejected without having

any effects on the cycle that is in progress.

3456789 10 11 12 13 14 15

Instruction

AI02031E

6543210

Status Register Out

High Impedance

MSB

6543210

Status Register Out

MSB

M45PE10-VMP6TP Datasheet(PDF) 21 Page - Numonyx B.V