PM25LV040-33QC データシートの表示（PDF） - PMC-Sierra, Inc

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PM25LV040-33QC

1 Mbit / 2 Mbit / 4 Mbit 3.0 Volt-only, Serial Flash Memory With 33 MHz SPI Bus Interface

PMC-Sierra, Inc 

PMC

Pm25LV010/020/040

DEVICE OPERATION (CONTINUED)

READ PRODUCT IDENTIFICATION BY JEDEC ID

COMMAND

The JEDEC ID READ instruction allows the user to read

the manufacturer and product ID of the devices. Refer to

Table 9 Product Identification for PMC manufacturer ID

and device ID. The second manufacturer ID (7Fh) is

shifted out on SO with the MSB first after JEDEC ID

READ command input, followed by the first manufac-

turer ID (9Dh) and the device ID, each bit been shifted

out during the falling edge of SCK.

If the CE# stays low after the last bit of device ID is

shifted out, the manufacturer ID and device ID will be loop-

ing until the pulled high of CE# signal.

Figure 4. Read Product Identification by JEDEC ID READ Sequence

CE#

SCK

SI

0

78

INSTRUCTION

1001 1111b

15 16

23 24

31

SO

HIGH IMPEDANCE

Manufacture ID2

Manufacture ID1

Device ID

Programmable Microelectronics Corp.

12

Issue Date: July, 2005, Rev: 1.2

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