PIC16F876-20I/SP Microchip Technology, PIC16F876-20I/SP Datasheet - Page 118

• Manufacturer Part Number: PIC16F876-20I/SP
• Description: IC MCU FLASH 8KX14 EE 28DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F876-20I/SP

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 28-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 368 B
• Interface Type: MSSP/PSP/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC16F87X
11.4
Clearing the GO/DONE bit during a conversion will
abort the current conversion. The A/D result register
pair will NOT be updated with the partially completed
A/D conversion sample. That is, the ADRESH:ADRESL
registers will continue to contain the value of the last
completed conversion (or the last value written to the
ADRESH:ADRESL registers). After the A/D conversion
is aborted, a 2T
FIGURE 11-3:
11.4.1
The ADRESH:ADRESL register pair is the location
where the 10-bit A/D result is loaded at the completion
of the A/D conversion. This register pair is 16-bits wide.
The A/D module gives the flexibility to left or right justify
the 10-bit result in the 16-bit result register. The A/D
FIGURE 11-4:
DS30292C-page 116
A/D Conversions
A/D RESULT REGISTERS
T
CY
Set GO bit
Holding capacitor is disconnected from analog input (typically 100 ns)
7
to T
AD
0000 00
ADRESH
AD
wait is required before the next
Conversion starts
A/D CONVERSION T
A/D RESULT JUSTIFICATION
T
AD
Right Justified
1
2 1 0 7
ADFM = 1
T
AD
b9
2
10-bit Result
T
ADRESL
AD
b8
3
T
AD
b7
AD
4
0
CYCLES
T
AD
b6
10-bit Result
5
T
AD
b5
6
acquisition is started. After this 2T
on the selected channel is automatically started. The
GO/DONE bit can then be set to start the conversion.
In Figure 11-3, after the GO bit is set, the first time seg-
ment has a minimum of T
Format Select bit (ADFM) controls this justification.
Figure 11-4 shows the operation of the A/D result justi-
fication. The extra bits are loaded with ’0’s’. When an
A/D result will not overwrite these locations (A/D dis-
able), these registers may be used as two general
purpose 8-bit registers.
ADRES is loaded
GO bit is cleared
ADIF bit is set
Holding capacitor is connected to analog input
T
AD
b4
Note:
7
7
T
AD
b3
ADRESH
8
The GO/DONE bit should NOT be set in
the same instruction that turns on the A/D.
10-bit Result
T
AD
b2
ADFM = 0
9
Left Justified
T
0 7 6 5
AD
b1
10 T
CY
ADRESL
2001 Microchip Technology Inc.
and a maximum of T
AD
b0
0000 00
11
AD
0
wait, acquisition
AD
.