Hardware Description
©
2011 Microchip Technology Inc.
DS51994A-page 7
1.2
PIM MODULE / MCP3903 CONNECTION AND PERIPHERAL USAGE
OVERVIEW
The MCP3903 ADC Evaluation Board for 16-Bit MCUs contains a 100-pin PIM socket,
compatible with Microchip’s PIM modules. The system comes with a PIM module: the
PIC24FJ128GA010.
For a complete description of the firmware programmed with these two modules, see
Chapter 1. “Hardware Description”
FIGURE 1-2:
Digital Connection Overview PIM/MCP3903 Connections.
Ports A, B, and D are used for signals such as push buttons, output LEDs, CS and
MCLR (for MCP3903 data mode setting). Output Capture 1 is used for MCP3903’s
clock generation. Serial communication is achieved through the MSSP module 1.
The MCP3903 device is an ADC with a second order modulator and a third order sync
filter. This Delta-Sigma A/D converter has an adjustable oversampling ratio. The CLKIN
pin of the MCP3903 is the ADC’s clock (MCLK) input. The MCP3903 ADC Evaluation
Board for 16-Bit MCUs offers two different options for the MCP3903 master clock
(MCLK).
CONTROL SWITCHES (X3)
MCP3903
SDI
SDO
RA5
RA4
SCK1/RF6
SDO1/RF8
SDI1/RF7
RB8/9/10
PIM Module
SCK
OC1/RD0
RA9/10
D6 D7
(Green)
RF3/U1TX
RF2/U1RX
UART SERIAL TO PC COMMUNICATION
RESET
DR
CS
INT3/RA4
IC4/RD11
IC3/RD10
CH0+
CH0-
CH1+
CH1-
CH2+
CH2-
CH3+
CH3-
CH4+
CH4-
CH5+
CH5-
Six Channels
Sigma-Delta
ADC
SPI Serial
Interface
AVDD
AGND
OSC1
OSC2
DGND
DVdd
Phase Correction
Clock Generation/
INT
Vref
