PIC16F84A-20/SS Microchip Technology, PIC16F84A-20/SS Datasheet - Page 435

• Manufacturer Part Number: PIC16F84A-20/SS
• Description: IC MCU FLASH 1KX14 EE 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F84A-20/SS

• Core Size: 8-Bit
• Program Memory Size: 1.75KB (1K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 13
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 68 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SSOP
• Controller Family/series: PIC16F
• No. Of I/o's: 13
• Eeprom Memory Size: 64Byte
• Ram Memory Size: 68Byte
• Cpu Speed: 20MHz
• No. Of Timers: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOPI3-DB16F84A - BOARD DAUGHTER ICEPIC3AC164307 - MODULE SKT FOR PM3 28SSOPAC164018 - MODULE SKT PROMATEII 20SSOP
• Data Converters: -
• Connectivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Section 23. 10-bit A/D Converter
23.7.2
A/D Result Registers
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 Format Select
bit (ADFM) controls this justification.
Figure 23-6
shows the operation of the A/D result justifica-
tion. The extra bits are loaded with ‘0’s’. When an A/D result will not overwrite these locations (A/D
disable), these registers may be used as two general purpose 8-bit registers.
Figure 23-6: A/D Result Justification
10-Bit Result
ADFM = 0
ADFM = 1
0
7
7
2 1 0 7
0 7 6 5
0
RESULT
RESULT
0000 00
0000 00
ADRESH
ADRESH
ADRESL
ADRESL
10-bits
10-bits
23
Left Justified
Right Justified
Preliminary
1997 Microchip Technology Inc.
DS31023A-page 23-13