PIC24FV32KA304-I/PT Microchip Technology, PIC24FV32KA304-I/PT Datasheet - Page 182

• Manufacturer Part Number: PIC24FV32KA304-I/PT
• Description: MCU 32KB FLASH 2KB RAM 44-TQFP
• Manufacturer: Microchip Technology

Specifications of PIC24FV32KA304-I/PT

• Processor Series: PIC24FV
• Core: PIC
• Data Bus Width: 16 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-44
• Development Tools By Supplier: MPLAB IDE Software
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC24FV32KA304 FAMILY
18.1
The UART module includes a dedicated 16-bit Baud
Rate Generator (BRG). The UxBRG register controls
the period of a free-running, 16-bit timer.
provides the formula for computation of the baud rate
with BRGH = 0.
EQUATION 18-1:
Example 18-1
error for the following conditions:
• F
• Desired Baud Rate = 9600
EXAMPLE 18-1:
DS39995B-page 182
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)
UxBRG
UxBRG
UxBRG
Baud Rate =
UxBRG =
Based on F
and PLL are disabled.
Based on F
provides the calculation of the baud rate
UART BAUD RATE WITH
BRGH = 0
BAUD RATE ERROR CALCULATION (BRGH = 0)
16 • (UxBRG + 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 (UxBRG + 1))
OSC
/Desired Baud Rate)/16) – 1
(1)
/2; Doze mode
/2; Doze mode and PLL are disabled.
Equation 18-1
– 1
The maximum baud rate (BRGH = 0) possible is
F
possible is F
Equation 18-2
the baud rate with BRGH = 1.
EQUATION 18-2:
The maximum baud rate (BRGH = 1) possible is F
(for UxBRG = 0) and the minimum baud rate possible
is F
Writing a new value to the UxBRG 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 UxBRG = 0) and the minimum baud rate
/(4 * 65536).
Baud Rate =
UxBRG =
CY
Based on F
and PLL are disabled.
/(16 * 65536).
shows the formula for computation of
(1)
UART BAUD RATE WITH
BRGH = 1
 2011 Microchip Technology Inc.
4 • (UxBRG + 1)
CY
4 • Baud Rate
= F
F
F
OSC
CY
CY
(1)
/2; Doze mode
– 1
CY
/4