The MCP6S21/2/6/8 family of one, two, six or eight
channel Programmable Gain Amplifiers (PGA) commu-
nicate using a standard 3-wire Serial Peripheral Inter-
face (SPI™) protocol. This application note shows how
to program the six channel MCP6S26 PGA gains,
channels and shutdown registers using the PIC16C505
microcontroller.
The PIC16C505 microcontroller does not have a hard-
ware SPI module, therefore, a firmware SPI (Bit Bang)
method is used to program the PGA. The MCP6S2X
Evaluation Board was used to develop this application
note firmware. For additional information, refer to the
MCP6S2X Evaluation Board User’s Guide (DS51327),
MCP6S21/2/6/8 PGA data sheet (DS21117) and
PIC16C505 data sheet (DS40192).M AN248
Interfacing MCP6S2X PGAs to PICmicro Microcontroller
Author: Ezana Haile COMMUNICATION
Microchip Technology Inc. Figure 1 shows the SPI communication format with the
clock idle low and the serial data latched at the rising
INTRODUCTION edge of the clock. This format is sometimes referred to
as “0,0” mode. Instructions for the MCP6S21/2/6/8
The MCP6S21/2/6/8 family of one, two, six or eight
……
