PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 165

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

15.0
The Analog-to-Digital (A/D) converter module has
4 inputs for the 18/20/28-pin devices. This module
allows conversion of an analog input signal to a
corresponding 10-bit digital number in PIC18F1230/
1330 devices.
The module has five registers:
• A/D Result Register High Byte (ADRESH)
• A/D Result Register Low Byte (ADRESL)
• A/D Control Register 0 (ADCON0)
• A/D Control Register 1 (ADCON1)
• A/D Control Register 2 (ADCON2)
REGISTER 15-1:
© 2006 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-4
bit 3-2
bit 1
bit 0
SEVTEN
R/W-0
10-BIT ANALOG-TO-DIGITAL
CONVERTER (A/D) MODULE
SEVTEN: Special Event Trigger Enable bit
1 = Special Event Trigger from Power Control PWM module is enabled
0 = Special Event Trigger from Power Control PWM module is disabled (default)
Unimplemented: Read as ‘0’
CHS1:CHS0: Analog Channel Select bits
00 = Channel 0 (AN0)
01 = Channel 1 (AN1)
10 = Channel 2 (AN2)
11 = Channel 3 (AN3)
GO/DONE: A/D Conversion Status bit
When ADON = 1:
1 = A/D conversion in progress
0 = A/D Idle
ADON: A/D On bit
1 = A/D converter module is enabled
0 = A/D converter module is disabled
U-0
—
ADCON0: A/D CONTROL REGISTER 0
W = Writable bit
‘1’ = Bit is set
U-0
—
Advance Information
U-0
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
CHS1
The ADCON0 register, shown in Register 15-1,
controls the operation of the A/D module. The
ADCON1 register, shown in Register 15-2, configures
the functions of the port pins. The ADCON2 register,
shown in Register 15-3, configures the A/D clock
source, programmed acquisition time and justification.
PIC18F1230/1330
R/W-0
CHS0
x = Bit is unknown
GO/DONE
R/W-0
DS39758B-page 163
ADON
R/W-0
bit 0