PIC18F6620T-I/PT Microchip Technology, PIC18F6620T-I/PT Datasheet - Page 208

• Manufacturer Part Number: PIC18F6620T-I/PT
• Description: IC MCU FLASH 32KX16 W/AD 64-TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F6620T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 52
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.75K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3840 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 52
• Number Of Timers: 2 x 8 bit
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM183022, DM183032
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit
• Data Rom Size: 1024 B
• Height: 1 mm
• Length: 10 mm
• Supply Voltage (max): 5.5 V, 5.8 V
• Supply Voltage (min): 3.9 V, 4.2 V
• Width: 10 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F6520/8520/6620/8620/6720/8720
18.2.2
The USART receiver block diagram is shown in
Figure 18-4. The data is received on the pin (RC7/RX1/
DT1 or RG2/RX2/DT2) and drives the data recovery
block. The data recovery block is actually a high-speed
shifter operating at 16 times the baud rate, whereas the
main receive serial shifter operates at the bit rate or at
F
systems.
To set up an Asynchronous Reception:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. If using interrupts, ensure that the GIE and PEIE
FIGURE 18-4:
DS39609B-page 206
OSC
Initialize the SPBRG register for the appropriate
baud rate. If a high-speed baud rate is desired,
set bit BRGH (Section 18.1 “USART Baud
Rate Generator (BRG)”).
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
If interrupts are desired, set enable bit RCxIE.
If 9-bit reception is desired, set bit RX9.
Enable the reception by setting bit CREN.
Flag bit RCxIF will be set when reception is com-
plete and an interrupt will be generated if enable
bit RCxIE was set.
Read the RCSTAx register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
Read the 8-bit received data by reading the
RCREG register.
If any error occurred, clear the error by clearing
enable bit CREN.
bits in the INTCON register (INTCON<7:6>) are
set.
. This mode would typically be used in RS-232
USART ASYNCHRONOUS
RECEIVER
RX pin
Baud Rate Generator
x64 Baud Rate CLK
USART RECEIVE BLOCK DIAGRAM
SPBRG
and Control
Pin Buffer
SPEN
Recovery
Interrupt
Data
or
64
16
CREN
18.2.3
This mode would typically be used in RS-485 systems.
To set up an Asynchronous Reception with Address
Detect Enable:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. If any error occurred, clear the CREN bit.
11. If the device has been addressed, clear the
RX9
Initialize the SPBRGx register for the appropri-
ate baud rate. If a high-speed baud rate is
required, set the BRGH bit.
Enable the asynchronous serial port by clearing
the SYNC bit and setting the SPEN bit.
If interrupts are required, set the RCEN bit and
select the desired priority level with the RCIP bit.
Set the RX9 bit to enable 9-bit reception.
Set the ADDEN bit to enable address detect.
Enable reception by setting the CREN bit.
The RCxIF bit will be set when reception is
complete. The interrupt will be Acknowledged if
the RCxIE and GIE bits are set.
Read the RCSTAx register to determine if any
error occurred during reception, as well as read
bit 9 of data (if applicable).
Read RCREGx to determine if the device is
being addressed.
ADDEN bit to allow all received data into the
receive buffer and interrupt the CPU.
Stop
MSb
RCIF
RCIE
RX9D
(8)
SETTING UP 9-BIT MODE WITH
ADDRESS DETECT
OERR
7
RSR Register
RCREG Register
8
Data Bus
 2004 Microchip Technology Inc.
1
FERR
0
LSb
Start
FIFO