PCM18XT0 Microchip Technology, PCM18XT0 Datasheet - Page 252

• Manufacturer Part Number: PCM18XT0
• Description: MODULE PROC PIC18F4685
• Manufacturer: Microchip Technology

Specifications of PCM18XT0

• Accessory Type: Processor Module
• Product: Microcontroller Modules
• Core Processor: PIC18F4685
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICE2000
• For Use With: ICE2000 - EMULATOR MPLAB-ICE 2000 POD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

PIC18F2682/2685/4682/4685
The analog reference voltage is software selectable to
either the device’s positive and negative supply voltage
(AV
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 converter’s internal RC oscillator.
The output of the sample and hold is the input into the
converter, which generates the result via successive
approximation.
FIGURE 19-1:
DS39761C-page 252
REF
DD
+ and RA2/AN2/V
and AV
Note 1:
2:
SS
Converter
), or the voltage level on the RA3/AN3/
10-Bit
Channels AN5 through AN7 are not available on PIC18F2682/2685 devices.
I/O pins have diode protection to V
A/D
Reference
Voltage
A/D BLOCK DIAGRAM
REF
-/CV
REF
pins.
V
V
REF
REF
+
-
(Input Voltage)
VCFG1:VCFG0
V
AIN
DD
and V
X
X
1
0
AV
0
1
X
X
SS
DD
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.
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
the A/D conversion. When the A/D conversion is
complete, the result is loaded into the ADRESH/
ADRESL registers, the GO/DONE bit (ADCON0
register) is cleared and A/D Interrupt Flag bit, ADIF, is
set. The block diagram of the A/D module is shown in
Figure 19-1.
.
(2)
AV
SS
(2)
CHS3:CHS0
1010
1001
1000
0111
0110
0101
0100
0011
0010
0001
0000
© 2009 Microchip Technology Inc.
AN10
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
(1)
(1)
(1)