XE8802MI000 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

XE8802MI000

Sensing Machine Data Acquisition SoC with 16+10 bit ZoomingADC™ Embedded RISC controller and LCD driver

Semtech Corporation 

XE8802 Sensing Machine Data Acquisition MCU

with ZoomingADC™ and LCD driver

2.4 Operating speed

2.4.1

Flash circuit version

The speed of the flash devices is not highly dependent upon the supply voltage. However, by limiting the

temperature range, the speed can be increased. The minimal guaranteed speed as a function of the supply voltage

and maximal temperature operating temperature is given in Figure2-2.

VBAT

VREG

2.4 - 5.5 V

1uF

VSS

Figure 2-1. Supply configuration for flash circuit operation.

NFASTREAD=1 85°C

NFASTREAD=1 45°C

NFASTREAD=0 85°C

NFASTREAD=0 45°C

7

6

5

4

3

2

1

0

2

3

4

5

supply voltage VBAT (V)

Figure 2-2. Guaranteed speed as a function of the supply voltage and maximal temperature.

The maximal speed of the device depends on the setting of the NFASTREAD pin. If NFASTREAD=1, the full 8k

instructions of the memory are available and the speed is limited to 2-3MIPS. If NFASTREAD=0, only 4k

instructions are available but the speed is doubled.

Important Note

The circuit has to be programmed for the correct option of the NFASTREAD pin. If not, the execution of the

software may not be correct.

© Semtech 2006

www.semtech.com

2-5

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