PIC18F65K90T-I/PT Microchip Technology, PIC18F65K90T-I/PT Datasheet - Page 377

• Manufacturer Part Number: PIC18F65K90T-I/PT
• Description: 32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F65K90T-I/PT

• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Timers: 8
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 16 Channel
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Eeprom Size: 1K x 8
• Ram Size: 2K 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-TQFP
• Lead Free Status / Rohs Status: Details

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
justification and location of the sign bit (ADSGN). The
extended sign bits allow for easier 16-bit math to be
FIGURE 23-3:
 2009-2011 Microchip Technology Inc.
0xFFF0
0xFFE0
0x0020
0x0010
0x0000
0xFFFF
0xFFEF
0x001F
0x000F
A/D RESULT REGISTERS
shows the operation of the A/D result
Result bits
Hex
Left Justified
…
…
ADFM = 0
A/D RESULT JUSTIFICATION
ADRESH
Left Justified
Two’s Complement Example Results Number Line
ADSGN bit
Decimal
-4095
-4096
4095
4094
ADRESL
…
-1
-2
…
2
1
0
12-Bit Result
0x0FFF
0x0FFE
0x0002
0x0001
0x0000
0xFFFF
0xFFFE
0xF001
0xF000
PIC18F87K90 FAMILY
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 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.
Hex
…
…
ADRESH
Right Justified
ADRESL
Right Justified
ADFM = 1
Decimal
-4095
-4096
4095
4094
…
…
-1
-2
2
1
0
DS39957D-page 377