MA180025 Microchip Technology, MA180025 Datasheet - Page 292

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F87J90 FAMILY
The analog reference voltage is software selectable to
either the device’s positive and negative supply voltage
(AV
RA3/AN3/V
The A/D Converter has a unique feature of being able
to operate while the device is in Sleep mode. To
operate in Sleep, the A/D conversion clock must be
derived from the A/D’s Internal RC oscillator.
The output of the sample and hold is the input into the
converter, which generates the result via successive
approximation.
Each port pin associated with the A/D Converter can be
configured as an analog input or as a digital I/O. The
ADRESH and ADRESL registers contain the result of
FIGURE 21-1:
DS39933D-page 292
DD
Note 1: Channels, AN15 through AN12, are not available on PIC18F6XJ90 devices.
and AV
REF
2: I/O pins have diode protection to V
Converter
+ and RA2/AN2/V
10-Bit
SS
A/D
), or the voltage level on the
Reference
Voltage
A/D BLOCK DIAGRAM
REF
- pins.
V
V
REF
REF
+
-
(Input Voltage)
VCFG<1:0>
V
(1,2)
AIN
DD
and V
AV
SS
DD
.
the A/D conversion. When the A/D conversion is com-
plete, the result is loaded into the ADRESH:ADRESL
register pair, the GO/DONE bit (ADCON0<1>) is
cleared and the A/D Interrupt Flag bit, ADIF, is set.
A device Reset forces all registers to their Reset state.
This forces the A/D module to be turned off and any
conversion in progress is aborted. The value in the
ADRESH:ADRESL register pair is not modified for a
Power-on Reset. These registers will contain unknown
data after a Power-on Reset.
The block diagram of the A/D module is shown in
Figure 21-1.
AV
SS
CHS<3:0>
1011
1010
1001
1000
0111
0110
0101
0100
0011
0010
0001
0000
 2010 Microchip Technology Inc.
AN11
AN10
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0