PIC16HV785 Microchip Technology Inc., PIC16HV785 Datasheet - Page 83

• Manufacturer Part Number: PIC16HV785
• Description: 20-pin Flash-based 8-bit Cmos Microcontroller
• Manufacturer: Microchip Technology Inc.

12.1.5
The A/D conversion is initiated by setting the
GO/DONE bit (ADCON0<1>). When the conversion is
complete, the A/D module:
• Clears the GO/DONE bit
• Sets the ADIF flag (PIR1<6>)
• Generates an interrupt (if enabled)
FIGURE 12-2:
12.1.6
The A/D conversion can be supplied in two formats: left
or right justified. The ADFM bit (ADCON0<7>) controls
the output format. Figure 12-3 shows the output
formats.
FIGURE 12-3:
© 2006 Microchip Technology Inc.
(ADFM = 0)
(ADFM = 1)
STARTING A CONVERSION
CONVERSION OUTPUT
T
CY
Set GO bit
Holding Capacitor is Disconnected from Analog Input (typically 100 ns)
to T
AD
Conversion Starts
A/D CONVERSION T
10-BIT A/D RESULT FORMAT
MSB
bit 7
bit 7
T
AD
Unimplemented: Read as ‘0’
1
T
AD
b9
ADRESH (ADDRESS:1Eh)
2
T
AD
b8
3
T
10-bit A/D Result
AD
b7
AD
4
CYCLES
T
Preliminary
AD
b6
5
MSB
T
AD
b5
6
bit 0
bit 0
If the conversion must be aborted, the GO/DONE bit
can be cleared in software. The ADRESH:ADRESL
registers will not be updated with the partially complete
A/D
ADRESH:ADRESL registers will retain the value of the
previous conversion. After an aborted conversion, a
2 T
be initiated. Following the delay, an input acquisition is
automatically started on the selected channel.
ADRESH and ADRESL registers are loaded,
GO bit is cleared,
ADIF bit is set,
Holding capacitor is connected to analog input
T
AD
b4
Note:
AD
7
delay is required before another acquisition can
T
PIC16F785/HV785
AD
b3
bit 7
bit 7
conversion
8
The GO/DONE bit should not be set in the
same instruction that turns on the A/D.
10-bit A/D Result
LSB
T
AD
b2
9
ADRESL (ADDRESS:9Eh)
T
AD
b1
Unimplemented: Read as ‘0’
10 T
sample.
AD
b0
11
DS41249D-page 81
Instead,
bit 0
LSB
bit 0
the