M45PE20-VMN6P Micron Technology Inc, M45PE20-VMN6P Datasheet - Page 19

• Manufacturer Part Number: M45PE20-VMN6P
• Manufacturer: Micron Technology Inc

Specifications of M45PE20-VMN6P

• Cell Type: NOR
• Density: 2Mb
• Access Time (max): 8ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC N
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 256K
• Supply Current: 8mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

M45PE20
6.3
Table 4.
1. The unique ID code is available only in the T9HX process (see
Manufacturer identification
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 Numonyx.
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 (12h).
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
20h
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
Figure
Important note on page
12h
8.
CFD length
6).
10h
UID
Important note on
(1)
CFD content
16 bytes
Instructions
(a)
19/47
.