Crystal CDB5400 User Manual

CDB5460

CDB5460 Evaluation Board and Software

Features

lDirect Shunt Sensor and Current

Transformer Interface

lRS-232 Serial Communication with PC
lOn-board 80C51 Microco nt r oller
lOn-board Voltage Reference
lLab Windows/CVI

-Register Setup & Chip Control

-FFT Analysis

-Time Domain Analysis

-Noise Histogram Analysis

lOn-board Data SRAM
lIntegrated RS-232 Test Mode

VIN+

TM

Evaluation Software

AGND

CRYSTAL

4.096 MHz

General Description

The CDB5460 is an inexpensive tool des igned to eval u­ate the functionality and performance of the CS5460.
The CS5460 Data Sheet is required in conjunction with
the CDB5460 evaluation board.

The evaluation board includes an LT1019 v oltage r efer­ence, an 80C51 microcontroller, an RS 232 transceiver,
and firmware. The 8051 controls the ser ial communica­tion between the evaluation board and the PC via the
firmware, enabling quick and easy acces s to all of the

CS5460’s registers and functions .
The CDB5460 includes software for Data Capture, Time

Domain Analysis, Histogram Analysis, and Frequency
Domain Analysis.

ORDERING INFORMATION

CDB5460 Evaluation Board

DGND

TEST

SWITCHES

VD+

Vu+VA-VA+

CRYSTAL

20.0 MHz
RESET

CIRCUITRY

VIN-

IIN+

IIN-

REF

AGND

CS5460

VOLTAGE

REFERENCE

EOUT

VREF

Preliminary Product Information

Cirrus Logic, Inc.
Crystal Semiconductor Products Division

P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.crystal.com

CS

SDI

SDO

SCLK

INT

EDIR

OUTIN

32k × 8

SRAM

80C51

Microcontroller

This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.

Copyright  Cirrus Logic, Inc. 1999

(All Rights Reserved)

RS232
TRANS­CEIVER

CONNECTOR

LEDs

RS232

MAR ‘99

DS279DB1

1

TABLE OF CONTENTS

PART I: HARDWARE ..........................................................................................3

Introduction .............. ................................................................. .................. 3

Evaluation Board Overview ........................................................................ 3

Analog Section .....................................................................................3

Digital Section ...................................................................................... 3

Power Supply Section ..........................................................................9

Using the Evaluation Board ........................................................................ 9

PART II: SOFTWARE ........................................................................................ 10

Installation Procedure ............................................................................... 10

Using the Software ...................................................................................10

Selecting and Testing a COM Port ........................................................... 11

Register Access in the Setup Window ......................... ...... ....... ................11

Conversion Window .................................................................................. 12

Viewing Pulse Rate Output Data .............................................................. 13

Data Collection Window Overview ............................................................ 13

Config Window .......................................................................................... 14

Collecting Data Sets ....................................... ...... ....... ...... ....... ................14

Retrieving Saved Data From a File ........................................................... 15

Analyzing Data .......................................................................................... 15

Histogram Information ..............................................................................15

Frequency Domain Information ................................................................15

Time Domain Information .........................................................................16

PCB LAYOUT ....................................................................................................20

CDB5460

Contacting Cirrus Logic Support

For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:

http://www.cirrus.com/corporate/contacts/

IBM, AT and PS/2 are trademarks of International Business Machines Corporation.
Windows is a trademark of Microsoft Corporation.
Lab Windows and CVI are trademarks of National Instruments.

TM

SPI

is a trademark of Motorola.

TM

Microwire
Preliminary product info rmation describes products which are i n p r od ucti on, b ut for which full characterizat i on da t a i s not yet available. Advance product i nfor-

mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information
contained in this document is accurate and reli able. However , the i nformati on is sub ject to change with out no tice and i s provi ded “AS IS” withou t warranty of

any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rig ht s
of third parties. This document i s the propert y of Cirru s Logic, Inc. and implie s no licen se under patent s, copyri ghts, trademarks, or tr ade secrets. No part of
this publication may be copied, reproduced , stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or
otherwise) without the pri or wri tt en consen t of Ci rrus Logic, Inc. Items from any Cirrus Logic websi t e or di sk may be pri nted for use by the user. However, no
part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical,
photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture
or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing
in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade­marks and service marks can be found at http://www.cirrus.com.

2 DS279DB1

is a trademark of National Semiconductor.

CDB5460

PART I: HARDWARE
Introduction

The CDB5460 evaluation board provides a quick
means of evaluating the CS5460 Analog-to-Digital
Converters (ADCs) and Computational Unit. The

CDB5460 evaluation board’s analog section oper­ates from either a single +5 V or dual ±2.5 V power

supply. The evaluation board interfaces the
CS5460 to an IBMTM compatible PC via an RS­232 interface. To accomplish this, the board comes
equipped with an 80C51 microcontroller and a 9­pin RS-232 cable which physically interfaces the
evaluation board to the PC. Additionally, analysis
software provides easy access to the internal regis­ters of the CS5460, and provides a means to display
the performance in the time domain or frequency
domain.

Evaluation Board Overview

The 3 dB corner of the filter is approximately 50K
Hz differential and common mode.

The evaluation board provides three voltage refer­ence options, on-chip, on-board and external, as
shown in Figure 2. Table 1 illustrates the options
available. With HDR4’s jumpers in position RE­FOUT, the on-chip reference provides 2.5 volts.
With HDR4’s jumpers in position LT1019, the
LT1019 provides 2.5 volts (the LT1019 was chosen
for its low drift, typically 5ppm/°C). By setting
HDR4’s jumpers to position REF+, the user can
supply an external voltage reference to J2’s REF+
and VA- inputs. Application Note 4 on the web
(http://www.cirrus.com/products//pubs.html) de­tails various voltage references.

Reference Description HDR4

LT1019

Selects on board

LT1019 Reference

(5ppm/

°C)

O O LT1019
O O REF+
O O REFOUT

The board is partitioned into two main sections: an­alog and digital. The analog section consists of the
CS5460 and a precision voltage reference. The dig­ital section consists of the 80C51 microcontroller,
32 Kilobytes of SRAM, the hardware test switches,
the reset circuitry, and the RS-232 interface. The
board also has a user friendly power supply con­nection.

Analog Section

The CS5460 is designed to accurately measure and
calculate: Energy, Instantaneous Power, I
V

while operating from a 4.096 MHz crystal.

RMS

As shown in Figure 1 there are four BNC connec­tors (J9, J10, J11, J12) provided for converter input
connections. A Shunt Sensor or Current Trans-

former can be connected to the conver ter’s curr ent
inputs via J10 (IIN+) and J9 (IIN-). A voltage di­vider can be connected to the converter’s voltage
input via J12 (VIN+) and (J11) (VIN-). Note, a
simple RC network filters the sensor’s output to re­duce any interference picked up by the input leads.

RMS

, and

REF+

REFOUT

Selects external

reference

Selects the reference

supplied by CS5460

Table 1. Reference Selection

O O LT1019
O O REF+
O O REFOUT

O O LT1019
O O REF+
O O REFOUT

The CS5460 serial interfaces are SPITM and Mi­crowireTM compatible. The interface control lines

(CS, SDI, SDO, and SCLK) are connected to the
80C51 microcontroller via port one. To interface an
external microcontroller, these control lines are
also connected to HDR6 (Header 6). However to
accomplish this, the evaluation board must be mod­ified in one of three ways: 1) cut the interface con­trol traces going to the microcontroller, 2) remove
resistors R4, R7, R8, and R13, or 3) remove the mi­crocontroller.

Digital Section

Figures 3 and 4 illustrate the schematic of the digi­tal section. It contains the microcontroller, test

DS279DB1 3

4 DS279DB1

HDR2X2

TP34

TP35

TP39

TP40

AGND

AGND

AGND

AGND

HDR1

12
34

HDR2X2

HDR2

21
43

HDR2X2

HDR8

21
43

HDR2X2

HDR9

12
34

AGND

AGND

AGND

AGND

C32

.01UF
COG

C33

.01UF
COG

C34

.01UF
COG

C35

.01UF
COG

VIN+

VIN-

IIN+

IIN-

AGND

J12

BNC_RA

J11

BNC_RA

J10

BNC_RA

J9

BNC_RA

R17 301

R18 301

0.1%

0.1%

301R25

0.1%

301R26

0.1%

C2
4700PF
COG

C3
4700PF
COG

D+

C30
10UF

DGND

XOUT

C15
.1UF

CPUCLK

VREFOUT

VREFIN

4.0960MHZ

C38

10PF
COG

DGND

XOUT

SCLK

SDO
/CS

VIN+
VIN-

Y2

U3

1

TP135

TP145
TP147

TP153
TP155
TP157

TP134
TP136TP137
TP138TP139
TP140TP141
TP142TP143
TP144
TP146
TP148TP149
TP150TP151
TP152
TP154
TP156

2
3
4
5
6
7
8
9
10
11

XOUT
CPUCLK
VD+
DGND
SCLK
SDO
/CS
NC
VIN+
VIN­VREFOUT

/EDIR
/EOUT

/INT

/RESET

PFMON

IIN+
IIN-

AGNDVREFIN

CS5460_EP

XIN

C39

10PF
COG

HDR2X2

HDR10

21
43

DGND

CPUCLK

/CS
SDI
SDO

SCLK

/INT
/EDIR
/EOUT

/RESET

DGND

Figure 1. Analog Schematic Part 1

XIN
SDI

VA+

24

TP111

23

TP113

22

TP115

21

TP117

20

TP119

19

TP121

18

NC

17
16

TP127

15

TP129
14
1312

TP133

HDR11X2

HDR6

TP110

XIN

TP112

SDI

TP114

/EDIR

TP116

/EOUT

TP118

/INT

TP120

/RESET

TP122TP123
TP124TP125

PFMON

TP126

IIN+

TP128

IIN-

TP130TP131
TP132

C14
.1UF

21

XTAL1

43
65
87
109
1211
1413
1615
1817
2019
2221

DCLK

DGND

PFMON

VA+

C29
10UF

A-

JP2

VA+

AGND

R19
10K

R28
15K

CDB5460

DS279DB1 5

VA+

2

C20
.1UF

A- A-

J2

REF+

A-

1

2

TERM_BLOCK

D+

10K

URESET /RESET

U4

LT1019CN8_2P5

OUTIN

TRIM

HTR

TEMP

GND

4

A-

R21 301

0.1%

A-

DGND

UCS

R12

USDI
USCLK
UDCLK

DGND

6

5
7
3

R31

U9

1
19

2
3
4
5
6
7
8
9

/G1
/G2

A1
A2
A3
A4
A5
A6
A7
A8

VCC

GND

TC74VHC541FW

R30
10K

Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8

R24

10K

49.9

A-

C1
.1UF

A- A-

20

18

/CS

17

SDI

16

SCLK

15

DCLK

14
13
12
11

10

DGND

VREFOUT

.1UF

DGND

C44

C16
.1UF

HDR3X2

HDR4

21
43

VREFIN

65

C40
.1UF

D+

1

1/G

2

SDO

/INT
/EDIR
/EOUT

XTAL1

1A1

4

1A2

6

1A3

8

1A4

19

2/G

11

2A1

13

2A2

15

2A3

17

2A4

SN74HCT244N

DGND

Figure 2. Analog Schematic Part 2

U8

VCC
1Y1

1Y2
1Y3
1Y4

2Y1
2Y2
2Y3
2Y4

GND

20

18
16
14
12

10

USDO
UINT
UEDIR
UEOUT

JP1

9
7
5
3

UXTAL1

DGND

VDDD

C41

.1UF

CDB5460

DGND

6 DS279DB1

20.000 MHZ
Y1

VDDD

URESET

1N4148

R9

R29

BYPASS CAP

D4

750K

DGND

200

C18

.1UF

JP4

NRST

SN74HC00N

SW_B3W_1100

DGND

RESET

S2

C19
.1UF

1
2

U2

VCC

GND

VDDD

DGND

DGND

TP33

TP32

TP31

TP30

TP11

TP10

TP9

TP8

UXTAL1

UM1
8751-8

19

XTAL1

18

XTAL2

31

EA

9

RST

1

1.0

2

3

4

5

6

7

8

1.7

8-BIT MICRO

PORT1

#

8751

PSEN

ALE

PROG

P0.0

PORT0

AD

P0.7
P2.0

PORT2

A

P2.7

P3.0/RXD

P3.1/TXD
P3.2/\INT0
P3.3/\INT1

P3.4/T0
P3.5/T1
P3.6/\WR
P3.7/\RD

TP14

29

30

39

38

37

36

35

34

33

32

21

22

23

24

25

26

27

28

10

11

12

13

14

15

16

17

TP15

TP38

TP23

TP24

TP29

TP28

TP27

TP26

TP25

TP69

TP1

TP2

TP3

TP4

TP5

TP6

TP7

FROM RS-232

TP43

TO RS-232

TP42

TP16

TP17

TP18

TP19

TP20

TP21

DGND

R1
R2
R3

DGND

TP22

200
200
200
200
200

DGND

R11

5.11K

C23
33PF
COG

C24
33PF

COG

DGND

14

3

7

USCLK
UDCLK

S1

OPEN

SW_DIP_3

USDI
USDO

UCS

3
2
1

R13
R16

R4
R7
R8

R10

5.11K

DGND

D2

1

2

3

8

7

6

54

LED_555_5003

C7
47UF

P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7

ALE

200
200
200

VDDD

DGND

C17
.1UF

HDR2X2

HDR7

21
43

P3.2
UINT
UEDIR
UEOUT
P3.6
P3.7

CDB5460

Figure 3. Digital Schematic Part 1

DS279DB1 7

U6

VCC

/W

A13

A8
A9

A11

/G

A10

/E
DQ7
DQ6
DQ5
DQ4
DQ3

SN74HC00N

9
10

1

C2+

2

GND

3

C2-

4

VSS

5

RX1

6

TX1

7

RX2

8

TX2

9

RX3

TX3

28
27
26
25
24
23
22
21
20
19
18
17
16
1514

U2

TP12
TP13

P3.6
P2.5
P2.0
P2.1
P2.3
P3.7
P2.2

P0.7
P0.6
P0.5
P0.4
P0.3

8

C27

10UF

10UF

FROM-PC

TO-PC

P2.6

C28

DGND

DGND

VDDDP2.6

C43
.1UF

U2
SN74HC00N

12
13

U2

SN74HC00N

4
5

DGND

DGND

11

6

5
9
4
8
3
7
2
6
1

DE9F_RA

CSUSBP2.7

J8

CDB5460

ALE
P0.0

P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

DGND

1

/OC

11

C

3

1D

4

2D

7

3D

8

4D

13

5D

14

6D 6Q

17

7D

18

8D

SN74HC373N

U5

VCC
GND

1Q
2Q
3Q
4Q
5Q

7Q
8Q

2
5
6
9
12
15
16
19

20
10

C26

10UF

A0
A1
A2
A3
A4
A5
A6
A7

P0.0
P0.1
P0.2

DGND

P2.4

A7
A6
A5
A4
A3
A2
A1
A0

10UF

DGND

C42
.1UF

C25

R1410K

1

A14

2

A12

3

A7

4

A6

5

A5

6

A4

7

A3

8

A2

9

A1

10

A0

11

DQ0

12

DQ1

13

DQ2
VSS

MCM6206DP20

VDDD

VDDD

20

19

18

17

16

TP71

15

TP72

14

13

12

11 10

U1

C1+

VCC

C1-

VDD

DO1

DI1

DO2

DI2

DO3

DI3

MC145407P

Figure 4. Digital Schematic Part 2

8 DS279DB1

VA-

CON_BANANA

J3

DGND AGND

CON_BANANA

J14

Z1
P6KE6V8P

DGND

Vu+

CON_BANANA

J4

Z2
P6KE6V8P

DGND

CON_BANANA

J6

AGND

47UF
C5

C6
47UF

HDR3X2

HDR3

21

A-

.1UF
C10

AGNDAGNDAGND

C12
.1UF

AGND

43
65

DGND

DGNDDGND

VD+

CON_BANANA

J13

VA+

CON_BANANA

J5

Z4
P6KE6V8P

C11
47UF

C21
.1UF

DGND

VA+

AGND

Z3
P6KE6V8P

AGND

C8
47UF

AGND

C13
.1UF

Figure 5. Power Supply Schematic

R15

FERRITE_BEAD

10

HDR4X2

HDR5

21
43

L2

65
87

VDDD

D+

CDB5460