PIC18F87K90-E/PT Microchip Technology, PIC18F87K90-E/PT Datasheet - Page 377
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC18F87K90-E/PT
Manufacturer Part Number
PIC18F87K90-E/PT
Description
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm TR
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F66K90-IMR.pdf
(570 pages)
Specifications of PIC18F87K90-E/PT
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
69
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 24x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
80-TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F87K90-E/PT
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
PIC18F87K90-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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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
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