PIC18F67K22-I/MR Microchip Technology, PIC18F67K22-I/MR Datasheet - Page 355

• Manufacturer Part Number: PIC18F67K22-I/MR
• Description: 128kB Flash, 4kB RAM, 1kB EE, NanoWatt XLP, GP 64 QFN 9x9x0.9mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F67K22-I/MR

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

23.2.2
The ADRESH:ADRESL register pair is where the 12-bit
A/D result and extended sign bits (ADSGN) are loaded
at the completion of a conversion. This register pair is
16 bits wide. The A/D module gives the flexibility of left
or right justifying the 12-bit result in the 16-Bit Result
register. The A/D Format Select bit (ADFM) controls
this justification.
FIGURE 23-3:
 2009-2011 Microchip Technology Inc.
0xFFF0
0xFFE0
0x0020
0x0010
0x0000
0xFFFF
0xFFEF
0x001F
0x000F
A/D RESULT REGISTERS
Result bits
Left Justified
Hex
ADFM = 0
…
…
A/D RESULT JUSTIFICATION
ADRESH
Left Justified
Two’s Complement Example Results Number Line
ADSGN bit
Decimal
ADRESL
-4095
-4096
4095
4094
…
…
-1
-2
2
1
0
12-Bit Result
PIC18F87K22 FAMILY
0x0FFF
0x0FFE
0x0002
0x0001
0x0000
0xFFFF
0xFFFE
0xF001
0xF000
Figure 23-3
fication and location of the extended sign bits
(ADSGN). The extended sign bits allow for easier
16-bit math to be performed on the result. The results
are represented as a two's compliment binary value.
This means that when sign bits and magnitude bits are
considered together in right justification, the ADRESH
and ADRESL registers can be read as a single signed
integer value.
When the A/D Converter is disabled, these 8-bit
registers can be used as two general purpose registers.
ADRESH
Hex
…
…
shows the operation of the A/D result justi-
Right Justified
ADRESL
Right Justified
ADFM = 1
Decimal
-4095
-4096
4095
4094
…
…
-1
-2
2
1
0
DS39960D-page 355