|
|
PDF CDB5460A Data sheet ( Hoja de datos )
| Número de pieza | CDB5460A | |
| Descripción | Evaluation Board and Software | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de CDB5460A (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
\
CDB5460A
CDB5460A Evaluation Board and Software
Features
z Direct Shunt Sensor and Current
Transformer Interface
z RS-232 Serial Communication with PC
z On-board 80C51 Microcontroller
z On-board Voltage Reference
z Lab Windows/CVITM Evaluation Software
- Register Setup & Chip Control
- FFT Analysis
- Time Domain Analysis
- Noise Histogram Analysis
z On-board Data SRAM
z Integrated RS-232 Test Mode
z “Auto-Boot” Demo with serial EEPROM
General Description
The CDB5460A is an inexpensive tool designed to eval-
uate the functionality and performance of the CS5460A.
The CS5460A Data Sheet is supplied in conjunction with
the CDB5460A evaluation board.
The evaluation board includes an LT1019 voltage refer-
ence, an 80C51 microcontroller, an RS232 transceiver,
and firmware. The 8051 controls the serial communica-
tion between the evaluation board and the PC via the
firmware, enabling quick and easy access to all of the
CS5460A’s registers and functions.
The CDB5460A includes software for Data Capture,
Time Domain Analysis, Histogram Analysis, and Fre-
quency Domain Analysis.
ORDERING INFORMATION
CDB5460A
Evaluation Board
VA+
V IN +
V IN -
IIN +
IIN -
VA- AGND
CRYSTAL
4.096 MHz
SERIAL
EEPROM
VD+
TEST
SW ITCHES
Vu+
CRYSTAL
20.0 MHz
CS
CS5460 SDI
SDO
SCLK
IN T
E D IR
EOUT
VREF
IN OUT
80C51
M icro co n tro lle r
REF
AGND
VOLTAGE
REFERENCE
32k × 8
SRAM
RESET
C IR C U IT R Y
RS232
TRANS-
C E IV E R
RS232
CONNECTOR
LEDs
Cirrus Logic, Inc.
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2002
(All Rights Reserved)
AUG ‘02
DS487DB3
1
1 page  
CDB5460A
1. HARDWARE
1.1 Introduction
The CDB5460A evaluation board provides a quick
means of evaluating the CS5460A Power Meter IC.
The CDB5460A evaluation board’s analog section
operates from either a single +5 V or dual ±2.5 V
power supply. The evaluation board interfaces the
CS5460A to an IBMTM compatible PC via an RS-
232 interface. To accomplish this, the board comes
equipped with an 80C51 microcontroller and a 9-
pin RS-232 cable which physically interfaces the
evaluation board to the PC. Additionally, analysis
software provides easy access to the internal regis-
ters of the CS5460A, and provides a means to dis-
play the performance in the time domain or
frequency domain.
1.2 Evaluation Board Overview
The board is partitioned into two main sections: an-
alog and digital. The analog section consists of the
CS5460A and a precision voltage reference. The
digital section consists of the 80C51 microcontrol-
ler, 32 Kilobytes of SRAM, the hardware test
switches, the reset circuitry, and the RS-232 inter-
face. The board also has a user friendly power sup-
ply connection.
1.2.1 Analog Section
The CS5460A is designed to accurately measure
and calculate: Energy, Instantaneous Power, IRMS,
and VRMS while operating from a 4.096 MHz crys-
tal. As shown in Figure 9 there are four BNC con-
nectors (J6, J7, J8, J9) provided for converter input
connections. A Shunt Sensor or Current Trans-
former can be connected to the converter’s current
inputs via J9 (IIN+) and J8 (IIN-). A voltage divid-
er can be connected to the converter’s voltage input
via J6 (VIN+) and J7 (VIN-). Note, a simple RC
network filters the sensor’s output to reduce any in-
terference picked up by the input leads. The 3 dB
corner of the filter is approximately 50 KHz differ-
ential and common mode.
The evaluation board provides three voltage refer-
ence options, on-chip, on-board and external, as
shown in Figure 9. Table 1 illustrates the options
available. With J18’s jumpers in position RE-
FOUT, the on-chip reference provides 2.5 volts.
With J18’s jumpers in position LT1019, the
LT1019 provides 2.5 volts (the LT1019 was chosen
for its low drift, typically 5 ppm/°C). By setting
J18’s jumpers to position REF+, the user can sup-
ply an external voltage reference to J26’s REF+
and VA- inputs. Application Note 4 on the web
(http://www.cirrus.com/products//pubs.html) de-
tails various voltage references.
Reference
LT1019
REF+
Description
Selects on board
LT1019 Reference
(5ppm/°C)
Selects external
reference
J18
O O LT1019
O O REF+
O O REFOUT
O O LT1019
O O REF+
O O REFOUT
REFOUT
Selects the reference
supplied by CS5460A
O O LT1019
O O REF+
O O REFOUT
Table 1. Reference Selection
The CS5460A serial interfaces are SPITM and Mi-
crowireTM compatible. The interface control lines
(CS, SDI, SDO, and SCLK) are connected to the
80C51 microcontroller via Port 1. To interface an
external microcontroller, these control lines are
also connected to J19 (Header 19). However to ac-
complish this, the evaluation board must be modi-
fied in one of three ways: 1) cut the interface
control traces going to the microcontroller, 2) re-
move resistors 24, 23, 22, and 21, or 3) remove the
microcontroller.
5
5 Page 
CDB5460A
Figure 2. Setup Window
value of the reset bit to ‘1’ (RS, bit 7 in the Config-
uration Register), the part will be reset, and all reg-
isters will return to their default values. Press the
Refresh Screen button after performing a reset to
update the screen with the new register values.
Note:
Although the CDB5460A software allows the
user to modify any of the bits in the
Configuration Register, changing certain bits
may cause the software and board to behave
erratically. For the evaluation system to
function properly, the Interrupt Output function
should be set to the default Active Low, and the
Eout / Edir Function should be set to the default
Normal. This applies only to the CDB5460A
evaluation system, and not to the CS5460A
chip itself.
2.4.4 Mask Register / Status Register
The Mask and Status Registers are displayed in
hexadecimal and decoded in this box to show what
each of the bits means. The Mask Register can be
modified by typing a value in the HEX: box, or by
checking the appropriate check boxes for the bits
that are to be masked. The Status Register cannot
be directly modified. It can only be reset by press-
ing the Clear Status Register Button. The HEX:
box for this register, and the LEDs are display only.
A LED that is on means that the corresponding bit
in the Status Register is set (except the Invalid
Command bit, which is inverted).
Note:
The value present in the Mask register may be
changed by the software during certain
operations to provide correct functionality of the
CDB5460A board.
2.4.5 Cycle Count / Pulse Rate / Time Base
Registers
These three boxes display the values of the Cycle
Count, Pulse Rate, and Time Base Registers in both
hexadecimal and decimal format. All three regis-
ters can be modified by typing a value in the corre-
sponding Value: or HEX: box.
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet CDB5460A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| CDB5460A | Evaluation Board and Software | Cirrus Logic |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |