PM25LV010-33QCE Просмотр технического описания (PDF) - PMC-Sierra, Inc

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производитель

PM25LV010-33QCE

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

PMC-Sierra, Inc 

PMC

REGISTERS

Pm25LV010/020/040

The Pm25LV010/020/040 are designed to interface di-

rectly with the synchronous Serial Peripheral Interface

(SPI) of Motorola MC68HCxx series of microcontrollers

or all the SPI interface equipped system controllers.

The devices have two superset features can be enabled

through the specific software instructions and Configu-

ration Register:

1. Configurable sector size: The memory array of

Pm25LV010 is divided into uniform 4 Kbyte sectors

or uniform 32 Kbyte blocks (sector group - consists

of eight adjacent sectors). The memory array of

Pm25LV020/040 are divided into uniform 4 Kbyte sec-

tors or uniform 64 Kbyte blocks (sector group - con-

sists of sixteen adjacent sectors).

The devices have an option to configure the 4 Kbyte

bottom sector (Sector 0) into four 1 Kbyte smaller

sectors (Sector 0_0, Sector 0_1, Sector 0_2 and

Sector 0_3). The finer granularity sector size archi-

tecture allows user to update data more efficiently.

This feature allows user to eliminate the need of

addtional serial EEPROM.

Refer to Table 1 for Configuration Register and Table 2

for Configuration Register Bit Definition.

Table 1. Configuration Register Format

Bit 7

X

Bit 6

X

Bit 5

X

Bit 4

SP0_3

Bit 3

SP0_2

Bit 2

SP0_1

Bit 1

SP0_0

Bit 0

SCFG

Table 2. Configuration Register Bit Definition

Bit

Name

Bit 0

SCFG

Bit 1

SP0_0

Bit 2

SP0_1

Bit 3

SP0_2

Bit 4

SP0_3

Bit 5 - 6 RES

Bit 7

RES

Definition

Sector Configuration:

"0" indicates the bottom sector is one 4 Kbyte sector (default)

"1" indicates the bottom sector is broken down to four 1 Kbyte sectors

This feature can be implemented only when BP0,BP1&BP2 of status

register were enabled to "1" which is in protection mode.

1 Kbyte Sector 0_0 Protection:

"0" indicates sector protection is disabled (default)

"1" indicates sector protection is enabled

1 Kbyte Sector 0_1Protection:

"0" indicates sector protection is disabled (default)

"1" indicates sector protection is enabled

1 Kbyte Sector 0_2 Protection:

"0" indicates sector protection is disabled (default)

"1" indicates sector protection is enabled

1 Kbyte Sector 0_3 Protection:

"0" indicates sector protection is disabled (default)

"1" indicates sector protection is enabled

Reserved for future (don't care)

Reserved for future (don't use)

Read/Write

R/W

R/W

R/W

R/W

R/W

N/A

N/A

Programmable Microelectronics Corp.

6

Issue Date: July, 2005, Rev: 1.2

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