PIC18F87K90T-I/PT Microchip Technology, PIC18F87K90T-I/PT Datasheet - Page 282
PIC18F87K90T-I/PT
Manufacturer Part Number
PIC18F87K90T-I/PT
Description
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm T/
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F66K90-IMR.pdf
(570 pages)
Specifications of PIC18F87K90T-I/PT
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
4 KB
Interface Type
I2C, SPI
Maximum Clock Frequency
64 MHz
Number Of Timers
11
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, 24 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
69
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 ~ 85°C
Package / Case
80-TQFP
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F87K90T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Company:
Part Number:
PIC18F87K90T-I/PTRSL
Manufacturer:
Microchip Technology
Quantity:
10 000
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PIC18F87K90 FAMILY
20.3.2
This mode does not use external resistors, but rather
internal resistor ladders that are configured to generate
the bias voltage.
The internal reference ladder actually consists of three
separate ladders. Disabling the internal reference
ladder disconnects all of the ladders, allowing external
voltages to be supplied.
Depending on the total resistance of the resistor
ladders, the biasing can be classified as low, medium
or high power.
FIGURE 20-4:
DS39957D-page 282
INTERNAL RESISTOR BIASING
LCDBIAS3
LCDBIAS2
LCDBIAS1
A Power Mode
B Power Mode
LRLAT<2:0>
3x Band Gap
LCDCST<2:0>
LCD BIAS INTERNAL RESISTOR LADDER CONNECTION DIAGRAM
V
DDCORE
LCDIRS
LRLAP<1:0>
VLCD3PE
VLCD2PE
VLCD1PE
V
V
DD
DD
Resistor
Ladder
Low
LRLBP<1:0>
LCDIRE
Resistor
Medium
Ladder
Table 20-3
ladders.
connections. When the internal resistor ladder is
selected, the bias voltage can either be from V
from V
TABLE 20-3:
Power Mode
Low
Medium
High
DDCORE
Figure 20-4
shows the total resistance of each of the
, depending on the LCDIRS setting.
Resistance of
Entire Ladder
INTERNAL RESISTANCE
LADDER POWER MODES
Resistor
2009-2011 Microchip Technology Inc.
Ladder
High
Nominal
shows the internal resister ladder
300 k
30 k
3 M
100 A
10 A
I
DD
1 A
DD
or
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