PIC18F84J90T-I/PT【PDF 2/41 页】IC PIC MCU FLASH 8KX16 80TQFP

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PIC18F85J90 FAMILY

DS39770C-page 10

2010 Microchip Technology Inc.

1.2

LCD Driver

The on-chip LCD driver includes many features that

make the integration of displays in low-power

applications easier. These include an integrated volt-

age regulator with charge pump that allows contrast

control in software and display operation above device

VDD.

1.3

Other Special Features

Communications: The PIC18F85J90 family

incorporates a range of serial communication

peripherals, including an Addressable USART, a

separate Enhanced USART that supports

LIN/J2602 Specification 1.2, and one Master SSP

module capable of both SPI and I2C (Master and

Slave) modes of operation.

CCP Modules: All devices in the family incorporate

two Capture/Compare/PWM (CCP) modules. Up to

four different time bases may be used to perform

several different operations at once.

10-Bit A/D Converter: This module incorporates

programmable acquisition time, allowing for a

channel to be selected and a conversion to be

initiated without waiting for a sampling period and

thus, reducing code overhead.

Extended Watchdog Timer (WDT): This

enhanced version incorporates a 16-bit prescaler,

allowing an extended time-out range that is stable

across operating voltage and temperature. See

Section 26.0 “Electrical Characteristics” for

time-out periods.

1.4

Details on Individual Family

Members

Devices in the PIC18F85J90 family are available in

64-pin and 80-pin packages. Block diagrams for the

two groups are shown in Figure 1-1 and Figure 1-2.

The devices are differentiated from each other in four

ways:

Flash program memory (three sizes, ranging

from 8 Kbytes for PIC18FX3J90 devices to

32 Kbytes for PIC18FX5J90 devices).

Data RAM (1024 bytes for PIC18FX3J90 and

PIC18FX4J90

devices,

2048

bytes

for

PIC18FX5J90 devices).

I/O ports (7 bidirectional ports on 64-pin devices,

9 bidirectional ports on 80-pin devices).

LCD Pixels: 132 pixels (33 SEGs x 4 COMs) can

be driven by 64-pin devices; 192 pixels

(48 SEGs x 4 COMs) can be driven by 80-pin

devices.

All other features for devices in this family are identical.

These are summarized in Table 1-1 and Table 1-2.

The pinouts for all devices are listed in Table 1-3 and

Table 1-4.

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