MCP355XDV-MS1 Microchip Technology, MCP355XDV-MS1 Datasheet - Page 20

• Manufacturer Part Number: MCP355XDV-MS1
• Description: BOARD DEV SENSOR APP MCP355X
• Manufacturer: Microchip Technology

Specifications of MCP355XDV-MS1

• Number Of Adc's: 1
• Number Of Bits: 22
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±0.3 V
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP355x
• Processor To Be Evaluated: MCP355x
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

MCP355X Sensor Application Developer’s Board User’s Guide
3.3
DS51609A-page 16
PIC18F4550
3.2.2.5
This menu options loads the DISPLAY_FS_VAL register. This is to allow for proper LCD
display during system design. For example, if a system is being designed that uses
“100 grams” as the full-scale calibration weight, this menu is used to set the value “100”
into the DISPLAY_FS_VAL register. The full-scale value options are 1, 2, 5, 10, 20, 50,
100, 200, or 500.
3.2.2.6
When in this menu, the second button becomes the calibrate full-scale button, labeled
OK. When this button is selected, the most recent ADC value, after averaging, will be
loaded into the FS
This device acts as I
channel 1 or channel 2 to the DataView on the PC. All averaging and channel 1
switching that is performed by the PIC16F877 occurs before the data is passed to the
PIC18F4550 and PC.
Note:
Note:
Note:
FULL-SCALE VALUE SELECTION
FULL-SCALE CALIBRATION
If the channel mode “Channel 1 Switching” is selected, the averaging will
actually be twice due to the positive and reverse polarity switched samples
being collected.
When displaying the value on the LCD display, the decimal point does not
move. This is to relax the LCD activity and keep the decimal point (and all
digits) from constantly switching location when the LCD output is
calculated.
The PIC18F4550 passes data to DataView on the PC coming from the
PIC16F877. This allows a system developer to write PIC16F877 firmware
that averages or otherwise post processes ADC data and then use the PC
to view this post processed data, see section below. Refer to Figure 2-1 for
Data Flow.
CAL
2
C slave and passes the PIC16F877 output data from either
register.
© 2006 Microchip Technology Inc.