Datasheet

Table Of Contents
PIC16(L)F1526/7
DS41458C-page 278 2011-2013 Microchip Technology Inc.
22.5.1.4 Synchronous Master Transmission
Set-up:
1. Initialize the SPxBRGH, SPxBRGL register pair
and the BRGH and BRG16 bits to achieve the
desired baud rate (see
Section 22.4 “EUSART
Baud Rate Generator (BRG)”
).
2. Set the RXx/DTx and TXx/CKx TRIS controls to
1’.
3. Enable the synchronous master serial port by
setting bits SYNC, SPEN and CSRC. Set the
TRIS bits corresponding to the RXx/DTx and
TXx/CKx I/O pins.
4. Disable Receive mode by clearing bits SREN
and CREN.
5. Enable Transmit mode by setting the TXEN bit.
6. If 9-bit transmission is desired, set the TX9 bit.
7. If interrupts are desired, set the TXxIE, GIE and
PEIE interrupt enable bits.
8. If 9-bit transmission is selected, the ninth bit
should be loaded in the TX9D bit.
9. Start transmission by loading data to the
TXxREG register.
FIGURE 22-10: SYNCHRONOUS TRANSMISSION
FIGURE 22-11: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
bit 0 bit 1 bit 7
Word 1
bit 2 bit 0 bit 1 bit 7
RXx/DTx
Write to
TXxREG Reg
TXxIF bit
(Interrupt Flag)
TXEN bit
1 1
Word 2
TRMT bit
Write Word 1
Write Word 2
Note: Sync Master mode, SPxBRGL = 0, continuous transmission of two 8-bit words.
pin
TXx/CKx pin
TXx/CKx pin
(SCKP =
0)
(SCKP =
1)
RXx/DTx pin
TXx/CKx pin
Write to
TXxREG reg
TXxIF bit
TRMT bit
bit 0
bit 1
bit 2
bit 6 bit 7
TXEN bit