M95128-RMB6TG datasheet(6/49 Pages) STMICROELECTRONICS

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Description

M95128-W M95128-R M95128-DF

6/49

Doc ID 5798 Rev 16

Description

The M95128 devices are Electrically Erasable PROgrammable Memories (EEPROMs)

organized as 16384 x 8 bits, accessed through the SPI bus.

The M95128-W can operate with a supply voltage from 2.5 V to 5.5 V, the M95128-R can

operate with a supply voltage from 1.8 V to 5.5 V, and the M95128-DF can operate with a

supply voltage from 1.7 V to 5.5 V, over an ambient temperature range of -40 °C / +85 °C.

The M95128-DF offers an additional page, named the Identification Page (64 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

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

Direction

Serial Clock

Input

Serial Data Input

Input

Serial Data Output

Output

Chip Select

Input

Write Protect

Input

HOLD

Hold

Input

VCC

Supply voltage

VSS

Ground

AI01789C

VCC

M95xxx

HOLD

VSS

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