PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 163

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

14.4.2
The operation of the Synchronous Master and Slave
modes is identical, except in the case of Sleep, or any
Idle mode and bit SREN, which is a “don’t care” in
Slave mode.
If receive is enabled by setting the CREN bit prior to
entering Sleep or any Idle mode, then a word may be
received while in this low-power mode. Once the word
is received, the RSR register will transfer the data to the
RCREG register; if the RCIE enable bit is set, the
interrupt generated will wake the chip from the low-
power mode. If the global interrupt is enabled, the
program will branch to the interrupt vector.
TABLE 14-10: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE RECEPTION
© 2006 Microchip Technology Inc.
INTCON
PIR1
PIE1
IPR1
RCSTA
RCREG
TXSTA
BAUDCON
SPBRGH
SPBRG
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for synchronous slave reception.
Name
EUSART SYNCHRONOUS SLAVE
RECEPTION
EUSART Receive Register
EUSART Baud Rate Generator Register High Byte
EUSART Baud Rate Generator Register Low Byte
GIE/GIEH PEIE/GIEL TMR0IE
ABDOVF
CSRC
SPEN
Bit 7
—
—
—
RCIDL
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
SREN
TXEN
RCIF
RCIE
RCIP
Bit 5
—
Advance Information
INT0IE
CREN
SYNC
SCKP
TXIE
TXIP
Bit 4
TXIF
CMP2IE
CMP2IP
CMP2IF
ADDEN
SENDB
BRG16
To set up a Synchronous Slave Reception:
1.
2.
3.
4.
5.
6.
7.
8.
9.
RBIE
Bit 3
Enable the synchronous master serial port by
setting bits SYNC and SPEN and clearing bit
CSRC.
If interrupts are desired, set enable bit RCIE.
If 9-bit reception is desired, set bit RX9.
To enable reception, set enable bit CREN.
Flag bit, RCIF, will be set when reception is
complete. An interrupt will be generated if
enable bit, RCIE, was set.
Read the RCSTA register to get the 9th bit (if
enabled) and determine if any error occurred
during reception.
Read the 8-bit received data by reading the
RCREG register.
If any error occurred, clear the error by clearing
bit CREN.
If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
PIC18F1230/1330
CMP1IE
CMP1IP
TMR0IF
CMP1IF
BRGH
FERR
Bit 2
—
CMP0IE
CMP0IP
CMP0IF
INT0IF
OERR
TRMT
WUE
Bit 1
TMR1IF
TMR1IE
TMR1IP
ABDEN
RX9D
TX9D
RBIF
DS39758B-page 161
Bit 0
on page
Values
Reset
41
43
43
43
42
42
42
42
42
42