PIC16F916-I/SP Microchip Technology, PIC16F916-I/SP Datasheet - Page 131

• Manufacturer Part Number: PIC16F916-I/SP
• Description: IC PIC MCU FLASH 8KX14 28SDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F916-I/SP

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 28-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 24
• Eeprom Size: 256 x 8
• Ram Size: 352 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 352 B
• Interface Type: SSP/I2C/AUSART/SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

11.1
The BRG supports both the Asynchronous and
Synchronous modes of the USART. It is a dedicated
8-bit baud rate generator. The SPBRG register controls
the period of a free running 8-bit timer. In
Asynchronous mode, bit BRGH (TXSTA<2>) also
controls the baud rate. In Synchronous mode, bit
BRGH is ignored. Table 11-1 shows the formula for
computation of the baud rate for different USART
modes which only apply in Master mode (internal
clock).
Given the desired baud rate and F
integer value for the SPBRG register can be calculated
using the formula in Table 11-1. From this, the error in
baud rate can be determined.
TABLE 11-1:
TABLE 11-2:
 2004 Microchip Technology Inc.
98h
18h
99h
Legend: x = unknown, — = unimplemented, read as ‘0’. Shaded cells are not used by the BRG.
Legend: X = value in SPBRG (0 to 255)
Address
SYNC
0
1
USART Baud Rate Generator
(BRG)
TXSTA
RCSTA
SPBRG Baud Rate Generator Register
Name
(Asynchronous) Baud Rate = F
(Synchronous) Baud Rate = F
BAUD RATE FORMULA
REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
CSRC
SPEN
Bit 7
BRGH = 0 (Low Speed)
Bit 6
RX9
TX9
OSC
SREN CREN ADDEN
TXEN SYNC
Bit 5
, the nearest
OSC
OSC
Bit 4
Preliminary
/(64 (X + 1))
/(4 (X + 1))
Bit 3
—
It may be advantageous to use the high baud rate
(BRGH = 1) even for slower baud clocks. This is
because the F
baud rate error in some cases.
Writing a new value to the SPBRG register causes the
BRG timer to be reset (or cleared). This ensures the
BRG does not wait for a timer overflow before
outputting the new baud rate.
11.1.1
The data on the RC7/RX/DT/SDI/SDA/SEG8 pin is
sampled three times by a majority detect circuit to
determine if a high or a low level is present at the RX
pin.
BRGH TRMT TX9D 0000 -010 0000 -010
FERR
Bit 2
OERR RX9D 0000 000x 0000 000x
SAMPLING
Bit 1
Baud Rate = F
OSC
BRGH = 1 (High Speed)
/(16 (X + 1)) equation can reduce the
Bit 0
PIC16F91X
N/A
OSC
0000 0000 0000 0000
POR, BOR
Value on:
/(16 (X + 1))
DS41250B-page 129
Value on
all other
Resets