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

2.5 Simplified supply selection criteria

• MTP devices always require the capacitor on VREG and VREG cannot be shorted to VBAT on MTP devices.

• ROM devices can operate 1.5 V to 5.5 V with lowest current requirement with the capacitor on VREG, and

VREG not shorted to VBAT.

• ROM devices can operate 1.2 V to 3.3 V at highest speed with VREG shorted to VBAT.

• If operation is always above 3.0 V, the capacitor on VMULT is not needed and VMULT can be always off.

• If the acquisition chain is used between 2.4 V and 3.0 V, then the capacitor on VMULT must be present and

VMULT must be set on during operation below 3.0 V.

• The acquisition chain does not operate below 2.4 V.

• The internal reference voltage for the LCD does not operate below 1.5 V.

acquisition chain

VMULT off

acquisition chain

VMULT on

MTP

Vgen internal reference

ROM (VBAT≠VREG)

CPU

parallel and serial ports

LCD driver and Vgen (no int. ref.)

RC and crystal oscillator

VLD

Comparators

Counters and PWM

ROM (VBAT=VREG)

0

1.2 1.5 2.4 3.0

5.5 VBAT (V)

Figure 2-7. Operating voltage range of the different circuit blocks. MTP devices do not operate below 2.4V. ROM

devices can operate in different voltage ranges if VREG and VBAT are short circuited or not.

© Semtech 2006

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