m45pe10 STMicroelectronics, m45pe10 Datasheet - Page 19

• Manufacturer Part Number: m45pe10
• Description: 1 Mbit, Page-erasable Serial Flash Memory With Byte-alterability And 75 Mhz Spi Bus Interface
• Manufacturer: STMicroelectronics

M45PE10
6.3
Table 4.
1. The unique ID code is available only in the T9HX process (see
Manufacturer
Identification
20h
Read identification (RDID)
The read identification (RDID) instruction allows to read the device identification data:
The manufacturer identification is assigned by JEDEC, and has the value 20h for
STMicroelectronics. The device identification is assigned by the device manufacturer, and
indicates the memory type in the first byte (40h), and the memory capacity of the device in
the second byte (11h). The UID contains the length of the following data in the first byte (set
to 10h), and 16 bytes of the optional customized factory data (CFD) content. The CFD bytes
are read-only and can be programmed with customers data upon their demand. If the
customers do not make requests, the devices are shipped with all the CFD bytes
programmed to zero (00h).
Any read identification (RDID) instruction while an erase or program cycle is in progress, is
not decoded, and has no effect on the cycle that is in progress.
The device is first selected by driving Chip Select (S) Low. Then, the 8-bit instruction code
for the instruction is shifted in. After this, the 24-bit device identification, stored in the
memory, the 8-bit CFD length followed by 16 bytes of CFD content will be shifted out on
serial data output (Q). Each bit is shifted out during the falling edge of Serial Clock (C).
The instruction sequence is shown in
The Read Identification (RDID) instruction is terminated by driving Chip Select (S) High at
any time during data output.
When Chip Select (S) is driven High, the device is put in the standby power mode. Once in
the standby power mode, the device waits to be selected, so that it can receive, decode and
execute instructions.
Read identification (RDID) data-out sequence
a. The 17 bytes of unique ID code are available only in the T9HX process (see
page
Manufacturer identification (1 byte)
Device identification (2 bytes)
A unique ID code (UID) (17 bytes, of which 16 available upon customer request)
6).
Memory type
40h
Device Identification
Memory capacity
11h
Figure
Important note on page
8.
CFD length
10h
6).
UID
(1)
Important note on
CFD content
16 bytes
Instructions
(a)
19/47
.