Hardware Description
2012 Microchip Technology Inc.
DS52033A-page 11
1.2
PIM MODULE/MCP3911 CONNECTION AND PERIPHERAL USAGE
OVERVIEW
The MCP3911 ADC Evaluation Board for 16-Bit MCUs contains a 100-pin PIM socket
compatible with Microchip’s PIM modules. The system comes with one PIM module,
the PIC24FJ128GA110.
FIGURE 1-2:
Digital Connection Overview PIM/MCP3911 Connections.
Ports A, B, and D are used for signals such as push buttons, output LEDs, CS and
MCLR (for MCP3911 data mode setting). Output Capture 1 is used for clock generation
in the MCP3911. Serial communication is achieved through the MSSP module 1.
The MCP3911 device is an ADC with a second order modulator and a third
order sinc
filter, plus a first order sinc filter used for higher OSR’s values. This Delta-Sigma A/D
converter has an adjustable oversampling ratio. The CLKIN pin of the MCP3911 is the
oversampling clock (MCLK) input. The MCP3911 ADC Evaluation Board for 16-Bit
MCUs offers two different options for the MCP3911 master clock (MCLK).
CONTROL SWITCHES (X3)
CH0+
CH0-
CH1+
CH1-
AVDD
AGND
OSC1
MCP3911
MDAT0
SDI
SDO
RA5
RA4
SCK1/RF6
SDO1/RF8
SDI1/RF7
RB8/9/10
PIM Module
SCK
OSC2
OC1/RD0
RA9/10
LD2 LD3
RF3/U1TX
RF2/U1RX
UART SERIAL TO PC COMMUNICATION
MDAT1
RESET
DR
CS
SPI Serial
Interface
Delta Sigma
Multi-Level
Modulator
Delta Sigma
Multi-Level
Modulator
PGA
PGA
+
+
-
-
INT
Vre
Clock Generation/
Phase Correction
Current Boost
Circuit
Modulator
Output
Translation
Block
SI
NC3
D
igit
a
l F
ilte
r
SINC3
D
ig
ita
l Fi
lte
r
DGND DVDD
INT3/RA4
IC4/RD11
IC3/RD10
