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Table of Contents

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1:

2:

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4:

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11:

12:

13:

14:

15:

uforCE.SCH

E4.SCH

CLK.SCH

MEMORY.SCH

PCMCIA.SCH

MISC.SCH

LCD.SCH

AUDIC.SCH

AUDPORT.SCH

VCC3.SCH

VCC5.SCH

P12V.SCH

LCDVEE.SCH

BATTCHRG.SCH

VCCSWTCH.SCH

A

A

uforCE

B

Elan SC400 - Windows CE

Demonstration Board Schematic

B

C

C

Rev

Sh.

Sh.

Sh.

Sh.

2.0:

2

3

5

6

Sh. 7

Sh. 8

Sh. 10

Rev 1.0:

Original design

D

Rev 1.1:

Sh. 3

Sh. 4

Sh. 5

Sh. 7

Sh. 11

Removed "no populate" designator from JP1.

Added TP to ROMCS0#.

Removed "no populate" designator from U6

Added RSTA A2 errata work-around.

Swapped nets TABXNEG & TABYPOS at J1.

Swapped nets LCDD0-LCDD3 at J2.

Changed P/N for J1 & J2.

Changed value of R43 (DISP_ON) & connected to LVEE

Added 2M resistor from U21 pin 19 to VSOURCE.

Added 2M resistor from U23 pin 19 to VSOURCE.

Corrected BATTEMP circuit.

Changed values of R118-R120 for FSTCHRG#.

Changed comparator bias voltage for VCC switch to Vbias

Sh. 12

Sh. 13

Sh. 10

Sh. 11

Sh. 14

Sh. 15

Sh. 14

E

Sh. 15

Removed BATTEMP signal from GPIO-CS3 pin

JP1 changed to 2mm spacing

JP2 added for PCMCIA booting

TC7SH32FU added to level shift SIRIN signal

U38D added to unused gates

Added GND to U14-9 and U14-10

Added circuit to slow turn-on of LCD

TC7SH32FU added to level shift PEN_OFF signal

R56 changed to 3.3K pull-up

R144 added to pull-up IOCHRDY signal

Filter circuit added to SPKR signal for noise supression

LDO regulator circuit changed to 2.85V nominal

Changed control of U21 PWM* mode

U21-9 connected to Vsource

U21 output capacitor increased; added bypass capacitor

Changed control of U23 PWM* mode

U23-9 connected to Vsource

Added bypass capacitor to U23

Changed D5 to no-populate

Changed enable for U24 to PCMVPP2A signal

Changed U24-8 to no-connect to cut output current

Slow-start circuit added to slow ramp-up of P12VOLT

Increased L8; decreased C146 on U25 output

Slow-start circuit added to slow ramp-up of LCDVEE

Changed U25-8 to no-connect to cut output current

U27 changed to MIC4576 for increased output currrent

Charger circuit changed to use MC33340 controller chip

for Fast/Trickle charge control and battery overtemperature

shutoff

Added LED to indicate charge mode

Charge currents changed to 1.25A/25mA nominal

Changed software controls for charger circuitry to

FASTCHG# and CHARGE# signals

Changed Vbatt/12VDC switch circuit to use SI4435DY

and power U37 from Vsource

Added current limit circuit to 12VDC

Modified Vbatt/12VDC switch circuit to work with MC33340

Adjusted BLx# sensors for 4.6V, 4.8V, 5.0V nominal

Removed BATTEMP circuit

R124 reduced to 1M for increased hysteresis

R128, R129, R137 increased to 5.1M for reduced hysteresis

3

D

LPD - Logic Products Division

(C) Advanced Micro Devices, Inc.

5204 E. Ben White Blvd.

Austin, TX 78741

AMD Proprietary/All Rights Reserved

Title

uforCE Demo Board

Size

Document Number

uforCE.SCH

Sheet

5

(800) 222-9323

E

AMD

4

Rev

2.0

1

of

15

Date:

Tuesday, October 14, 1997

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