PIC18F6490-E/PT Microchip Technology, PIC18F6490-E/PT Datasheet - Page 199

• Manufacturer Part Number: PIC18F6490-E/PT
• Description: IC PIC MCU FLASH 16KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F6490-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• For Use With: DM163028 - BOARD DEMO PICDEM LCD
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

16.0
PIC18F6390/6490/8390/8490 devices have three
serial I/O modules: the MSSP module, discussed in the
previous chapter and two Universal Synchronous
Asynchronous Receiver Transmitter (USART) mod-
ules. (Generically, the USART is also known as a Serial
Communications Interface or SCI.) The USART can be
configured as a full-duplex asynchronous system that
can communicate with peripheral devices, such as
CRT terminals and personal computers. It can also be
configured as a half-duplex synchronous system that
can communicate with peripheral devices, such as A/D
or D/A integrated circuits, serial EEPROMs, etc.
There are two distinct implementations of the USART
module in these devices: the Enhanced USART
(EUSART) discussed here and the Addressable
USART discussed in the next chapter. For this device
family, USART1 always refers to the EUSART, while
USART2 is always the AUSART.
The EUSART and AUSART modules implement the
same core features for serial communications; their
basic operation is essentially the same. The EUSART
module
Automatic Baud Rate Detection (ABD) and calibration,
automatic wake-up on Sync Break reception and 12-bit
Break character transmit. These features make it
ideally suited for use in Local Interconnect Network bus
(LIN bus) systems.
The EUSART can be configured in the following
modes:
• Asynchronous (full-duplex) with:
• Synchronous – Master (half-duplex) with
• Synchronous – Slave (half-duplex) with selectable
© 2007 Microchip Technology Inc.
- Auto-wake-up on character reception
- Auto-baud calibration
- 12-bit Break character transmission
selectable clock polarity
clock polarity
ENHANCED UNIVERSAL
SYNCHRONOUS
ASYNCHRONOUS RECEIVER
TRANSMITTER (EUSART)
provides
additional
features,
PIC18F6390/6490/8390/8490
including
The pins of the EUSART are multiplexed with the
functions
RC7/RX1/DT1). In order to configure these pins as an
EUSART:
• bit SPEN (RCSTA1<7>) must be set (= 1)
• bit TRISC<7> must be set (= 1)
• bit TRISC<6> must be set (= 1)
The operation of the Enhanced USART module is
controlled through three registers:
• Transmit Status and Control Register 1 (TXSTA1)
• Receive Status and Control Register 1 (RCSTA1)
• Baud Rate Control Register 1 (BAUDCON1)
The
Register 16-2 and Register 16-3.
Note:
registers
The USART control will automatically
reconfigure the pin from input to output as
needed.
of
are
PORTC
described
(RC6/TX1/CK1
DS39629C-page 197
in
Register 16-1,
and