M50FLW040AN5TP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M50FLW040AN5TP

4-Mbit (5 × 64 Kbyte blocks + 3 × 16 × 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory

STMicroelectronics 

M50FLW040A, M50FLW040BFirmware hub/low pin count (FWH/LPC) interface Configuration Reg-

Table 17. General-Purpose Input Register definition

Bit

Bit Name Value

Function(1)

7-5

Reserved

‘1’ Input Pin GPI4 is at VIH

4

GPI4

‘0’ Input Pin GPI4 is at VIL

‘1’ Input Pin GPI3 is at VIH

3

GPI3

‘0’ Input Pin GPI3 is at VIL

‘1’ Input Pin GPI2 is at VIH

2

GPI2

‘0’ Input Pin GPI2 is at VIL

‘1’ Input Pin GPI1 is at VIH

1

GPI1

‘0’ Input Pin GPI1 is at VIL

‘1’ Input Pin GPI0 is at VIH

0

GPI0

‘0’ Input Pin GPI0 is at VIL

1. Applies to the General Purpose Inputs Register (GPI-REG).

6.2

Firmware hub/low-pin count (FWH/LPC) General-Purpose

Input Register

The FWH/LPC General Purpose Input Register holds the state of the General Purpose

Input pins, GPI0-GPI4. When this register is read, the state of these pins is returned. This

register is read-only. Writing to it has no effect.

The signals on the FWH/LPC Interface General Purpose Input pins should remain constant

throughout the whole Bus Read cycle.

6.3

Manufacturer Code Register

Reading the Manufacturer Code Register returns the value 20h, which is the Manufacturer

Code for STMicroelectronics. This register is read-only. Writing to it has no effect.

37/64

Share Link: