PIC16F1947-I/PT Microchip Technology Inc., PIC16F1947-I/PT Datasheet - Page 300

• Manufacturer Part Number: PIC16F1947-I/PT
• Description: 64 TQFP 10x10x1mm TRAY28KB Flash, 1KB RAM, 256B EEPROM, LCD, 1.8-5.5V
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F1947-I/PT

• A/d Inputs: 17-Channel, 10-Bit
• Comparators: 3
• Cpu Speed: 8 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 54
• Interface: CAN/I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 28K Bytes
• Ram Size: 1K Bytes
• Speed: 32 MHz
• Timers: 4-8-bit, 1-16-bit
• Voltage, Range: 1.8-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16F/LF1946/47
25.1.1.5
The TRMT bit of the TXxSTA register indicates the
status of the TSR register. This is a read-only bit. The
TRMT bit is set when the TSR register is empty and is
cleared when a character is transferred to the TSR
register from the TXxREG. The TRMT bit remains clear
until all bits have been shifted out of the TSR register.
No interrupt logic is tied to this bit, so the user needs to
poll this bit to determine the TSR status.
25.1.1.6
The EUSART supports 9-bit character transmissions.
When the TX9 bit of the TXxSTA register is set the
EUSART will shift 9 bits out for each character transmit-
ted. The TX9D bit of the TXxSTA register is the ninth,
and Most Significant, data bit. When transmitting 9-bit
data, the TX9D data bit must be written before writing
the 8 Least Significant bits into the TXxREG. All nine
bits of data will be transferred to the TSR shift register
immediately after the TXxREG is written.
A special 9-bit Address mode is available for use with
multiple receivers. See
Detection”
FIGURE 25-3:
DS41414B-page 300
Note:
Reg. Empty Flag)
Reg. Empty Flag)
Write to TXxREG
(Transmit Buffer
(Transmit Shift
TXx/CKx
BRG Output
(Shift Clock)
TRMT bit
TXxIF bit
The TSR register is not mapped in data
memory, so it is not available to the user.
for more information on the Address mode.
TSR Status
Transmitting 9-Bit Characters
pin
ASYNCHRONOUS TRANSMISSION
Word 1
Transmit Shift Reg
Word 1
Section 25.1.2.8 “Address
1 T
CY
Start bit
bit 0
Preliminary
bit 1
Word 1
25.1.1.7
1.
2.
3.
4.
5.
6.
7.
8.
9.
Initialize the SPxBRGH:SPxBRGL register pair
and the BRGH and BRG16 bits to achieve the
desired baud rate (see
Baud Rate Generator
Set the RXx/DTx and TXx/CKx TRIS controls to
‘1’.
Enable the asynchronous serial port by clearing
the SYNC bit and setting the SPEN bit.
If 9-bit transmission is desired, set the TX9
control bit. A set ninth data bit will indicate that
the 8 Least Significant data bits are an address
when the receiver is set for address detection.
Set the CKTXP control bit if inverted transmit
data polarity is desired.
Enable the transmission by setting the TXEN
control bit. This will cause the TXxIF interrupt bit
to be set.
If interrupts are desired, set the TXxIE interrupt
enable bit. An interrupt will occur immediately
provided that the GIE and PEIE bits of the
INTCON register are also set.
If 9-bit transmission is selected, the ninth bit
should be loaded into the TX9D data bit.
Load 8-bit data into the TXxREG register. This
will start the transmission.
Asynchronous Transmission Set-up:
bit 7/8
 2010 Microchip Technology Inc.
(BRG)”).
Stop bit
Section 25.3 “EUSART