PIC24F04KA200T-I/ST Microchip Technology, PIC24F04KA200T-I/ST Datasheet - Page 136

• Manufacturer Part Number: PIC24F04KA200T-I/ST
• Description: PIC24F Core, 4KB Flash, 512B RAM, 3V, Deep Sleep, 10-bit 500ksps ADC, CTMU, UART
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 24Fr

Specifications of PIC24F04KA200T-I/ST

• Core Processor: PIC
• Core Size: 16-Bit
• Speed: 32MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (1.375K x 24)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC24F04KA201 FAMILY
17.1
The UART module includes a dedicated 16-bit Baud
Rate Generator (BRG). The U1BRG register controls
the period of a free-running, 16-bit timer. Equation 17-1
provides the formula for computation of the baud rate
with BRGH = 0.
EQUATION 17-1:
Example 17-1 provides the calculation of the baud rate
error for the following conditions:
• F
• Desired Baud Rate = 9600
EXAMPLE 17-1:
DS39937B-page 134
Note 1:
Desired Baud Rate
Solving for UxBRG value:
Calculated Baud Rate = 4000000/(16 (25 + 1))
Error
Note 1:
CY
= 4 MHz
UART Baud Rate Generator (BRG)
U1BRG
U1BRG
U1BRG
Baud Rate =
U1BRG =
Based on F
and PLL are disabled.
Based on F
UART BAUD RATE WITH
BRGH = 0
BAUD RATE ERROR CALCULATION (BRGH = 0)
16 • (U1BRG + 1)
CY
16 • Baud Rate
= F
= ((F
= ((4000000/9600)/16) – 1
= 25
= 9615
= (Calculated Baud Rate – Desired Baud Rate)
= (9615 – 9600)/9600
= 0.16%
CY
= F
Desired Baud Rate
= F
CY
F
F
CY
CY
OSC
CY
/(16 (U1BRG + 1))
OSC
/Desired Baud Rate)/16) – 1
(1)
/2, Doze mode
/2, Doze mode and PLL are disabled.
– 1
Preliminary
The maximum baud rate (BRGH = 0) possible is
F
possible is F
Equation 17-2 provides the formula for computation of
the baud rate with BRGH = 1.
EQUATION 17-2:
The maximum baud rate (BRGH = 1) possible is F
(for U1BRG = 0) and the minimum baud rate possible
is F
Writing a new value to the U1BRG register causes the
BRG timer to be reset (cleared). This ensures the BRG
does not wait for a timer overflow before generating the
new baud rate.
CY
Note 1:
CY
/16 (for U1BRG = 0) and the minimum baud rate
/(4 * 65536).
Baud Rate =
U1BRG =
CY
Based on F
and PLL are disabled.
/(16 * 65536).
(1)
UART BAUD RATE WITH
BRGH = 1
© 2009 Microchip Technology Inc.
4 • (U1BRG + 1)
CY
4 • Baud Rate
= F
F
F
OSC
CY
CY
(1)
/2, Doze mode
– 1
CY
/4