PIC16LF1826-I/SS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF1826-I/SS

18/20/28-Pin Flash Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC16F/LF1826/27

25.4.2.3 EUSART Synchronous Slave

Reception

The operation of the Synchronous Master and Slave

modes is identical (Section 25.4.1.5 “Synchronous

Master Reception”), with the following exceptions:

• Sleep

• CREN bit is always set, therefore the receiver is

never Idle

• SREN bit, which is a “don’t care” in Slave mode

A character may be received while in Sleep mode by

setting the CREN bit prior to entering Sleep. 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 device from Sleep

and execute the next instruction. If the GIE bit is also

set, the program will branch to the interrupt vector.

25.4.2.4 Synchronous Slave Reception

Set-up:

1. Set the SYNC and SPEN bits and clear the

CSRC bit.

2. Clear the ANSEL bit for both the CK and DT pins

(if applicable).

3. If interrupts are desired, set the RCIE bit of the

PIE1 register and the GIE and PEIE bits of the

INTCON register.

4. If 9-bit reception is desired, set the RX9 bit.

5. Set the CREN bit to enable reception.

6. The RCIF bit will be set when reception is

complete. An interrupt will be generated if the

RCIE bit was set.

7. If 9-bit mode is enabled, retrieve the Most

Significant bit from the RX9D bit of the RCSTA

register.

8. Retrieve the 8 Least Significant bits from the

receive FIFO by reading the RCREG register.

9. If an overrun error occurs, clear the error by

either clearing the CREN bit of the RCSTA

register or by clearing the SPEN bit which resets

the EUSART.

TABLE 25-10: SUMMARY OF REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE

RECEPTION

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

APFCON0

APFCON1

BAUDCON

RXDTSEL

—

ABDOVF

SDO1SEL

—

RCIDL

SS1SEL

—

—

P2BSEL(1) CCP2SEL(1)

—

—

SCKP

BRG16

P1DSEL

—

—

P1CSEL

—

WUE

CCP1SEL

TXCKSEL

ABDEN

INTCON

GIE

PEIE

TMR0IE

INTE

IOCIE

TMR0IF

INTF

IOCIF

PIE1

TMR1GIE ADIE

RCIE

TXIE

SSPIE

CCP1IE TMR2IE TMR1IE

PIR1

TMR1GIF ADIF

RCIF

TXIF

SSPIF

CCP1IF TMR2IF TMR1IF

RCREG

EUSART Receive Data Register

RCSTA

SPEN

RX9

SREN

CREN

ADDEN

FERR

OERR

RX9D

TRISB

TXSTA

TRISB7

CSRC

TRISB6

TX9

TRISB5

TXEN

TRISB4

SYNC

TRISB3

SENDB

TRISB2

BRGH

TRISB1

TRMT

TRISB0

TX9D

Legend:

*

Note 1:

— = unimplemented location, read as ‘0’. Shaded cells are not used for Synchronous Slave Reception.

Page provides register information.

PIC16F/LF1827 only.

Register

on Page

122

122

298

101

102

105

292*

297

129

296

DS41391C-page 314

Preliminary

 2010 Microchip Technology Inc.

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