M95320-R データシートの表示（PDF） - STMicroelectronics

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M95320-R

32-Kbit serial SPI bus EEPROM with high-speed clock

STMicroelectronics 

Description

1

Description

M95320-W M95320-R M95320-DR

The M95320 devices are Electrically Erasable PROgrammable Memories (EEPROMs)

organized as 4096 x 8 bits, accessed through the SPI bus.

The M95320 devices can operate with a supply range from 1.8 V up to 5.5 V, and are

guaranteed over the -40 °C/+85 °C temperature range.

The M95320-D offers an additional page, named the Identification Page (32 bytes). The

Identification Page can be used to store sensitive application parameters which can be

(later) permanently locked in Read-only mode.

Figure 1. Logic diagram

VCC

D

C

S

W

HOLD

Q

M95xxx

VSS

AI01789C

The SPI bus signals are C, D and Q, as shown in Figure 1 and Table 1. The device is

selected when Chip Select (S) is driven low. Communications with the device can be

interrupted when the HOLD is driven low.

Table 1. Signal names

Signal name

Function

C

Serial Clock

D

Serial Data Input

Q

Serial Data Output

S

Chip Select

W

Write Protect

HOLD

Hold

VCC

Supply voltage

VSS

Ground

Direction

Input

Input

Output

Input

Input

Input

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Doc ID 5711 Rev 14

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