PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 153

• Manufacturer Part Number: PIC16F946T-I/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

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)
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.
FIGURE 12-2:
12.1.6
The A/D conversion can be supplied in two formats: left
or right shifted. The ADFM bit (ADCON0<7>) controls
the output format. Figure 12-3 shows the output
formats.
FIGURE 12-3:
© 2005 Microchip Technology Inc.
Note:
AD
(ADFM = 0)
(ADFM = 1)
delay is required before another acquisition can
conversion
STARTING A CONVERSION
The GO/DONE bit should not be set in the
same instruction that turns on the A/D.
CONVERSION OUTPUT
T
CY TO
Set GO/DONE bit
Holding Capacitor is Disconnected from Analog Input (typically 100 ns)
T
AD
MSB
bit 7
bit 7
Conversion Starts
A/D CONVERSION T
10-BIT A/D RESULT FORMAT
Unimplemented: Read as ‘0’
T
AD
sample.
1 T
AD
b9
2 T
AD
b8
Instead,
ADRESH
3 T
10-bit A/D Result
AD
b7
AD
4 T
CYCLES
Preliminary
the
AD
b6
5 T
MSB
AD
b5
bit 0
bit 0
6 T
ADRESH and ADRESL registers are loaded,
GO/DONE bit is cleared,
ADIF bit is set,
Holding Capacitor is Connected to Analog Input
AD
b4
7 T
bit 7
bit 7
AD
b3
8 T
10-bit A/D Result
LSB
AD
b2
9
T
Unimplemented: Read as ‘0’
AD
b1
10 T
ADRESL
PIC16F946
AD
b0
11
DS41265A-page 151
bit 0
LSB
bit 0