PIC18F23K20 MICROCHIP [Microchip Technology], PIC18F23K20 Datasheet - Page 258

• Manufacturer Part Number: PIC18F23K20
• Description: 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2XK20/4XK20
18.4.1.5
1.
2.
3.
FIGURE 18-10:
FIGURE 18-11:
DS41303G-page 258
TX/CK pin
(SCKP = 0)
TX/CK pin
(SCKP = 1)
TRMT bit
RX/DT
pin
Write to
TXREG Reg
TXIF bit
(Interrupt Flag)
TXEN bit
Note:
Initialize the SPBRGH, SPBRG register pair and
the BRGH and BRG16 bits to achieve the
desired baud rate (see Section 18.3 “EUSART
Baud Rate Generator (BRG)”).
Set the RX/DT and TX/CK TRIS controls to ‘1’.
Enable the synchronous master serial port by
setting bits SYNC, SPEN and CSRC. Set the
TRIS bits corresponding to the RX/DT and
TX/CK I/O pins.
‘1’
Synchronous Master Transmission
Set-up:
Sync Master mode, SPBRG = 0, continuous transmission of two 8-bit words.
Write Word 1
TXREG reg
RX/DT pin
TX/CK pin
TRMT bit
TXEN bit
TXIF bit
Write to
SYNCHRONOUS TRANSMISSION
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
bit 0
Write Word 2
bit 1
Word 1
bit 0
bit 2
bit 1
bit 7
4.
5.
6.
7.
8.
9.
Disable Receive mode by clearing bits SREN
and CREN.
Enable Transmit mode by setting the TXEN bit.
If 9-bit transmission is desired, set the TX9 bit.
If interrupts are desired, set the TXIE, GIE and
PEIE interrupt enable bits.
If 9-bit transmission is selected, the ninth bit
should be loaded in the TX9D bit.
Start transmission by loading data to the
TXREG register.
bit 2
bit 0
Word 2
bit 1
bit 6
 2010 Microchip Technology Inc.
bit 7
bit 7
‘1’