PIC16C72-04SLASHSS datasheet(109/288 Pages) MICROCHIP

109 / 288 page

DS30390E-page 109

PIC16C7X

Steps to follow when setting up an Asynchronous

Reception:

Initialize the SPBRG register for the appropriate

baud rate. If a high speed baud rate is desired,

set bit BRGH. (Section 12.1).

Enable the asynchronous serial port by clearing

bit SYNC, and setting bit SPEN.

If interrupts are desired, then set enable bit

RCIE.

If 9-bit reception is desired, then set bit RX9.

Enable the reception by setting bit CREN.

Flag bit RCIF will be set when reception is com-

plete and an interrupt will be generated if enable

bit RCIE was set.

Read the RCSTA register to get the ninth 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

enable bit CREN.

TABLE 12-7:

REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on:

POR,

BOR

Value on

all other

Resets

0Ch

PIR1

PSPIF(1)

ADIF

RCIF

TXIF

SSPIF

CCP1IF

TMR2IF

TMR1IF

0000 0000

18h

RCSTA

SPEN

RX9

SREN

CREN

—

FERR

OERR

RX9D

0000 -00x

1Ah

RCREG

USART Receive Register

0000 0000

8Ch

PIE1

PSPIE(1)

ADIE

RCIE

TXIE

SSPIE

CCP1IE

TMR2IE

TMR1IE

0000 0000

98h

TXSTA

CSRC

TX9

TXEN

SYNC

—

BRGH

TRMT

TX9D

0000 -010

99h

SPBRG

Baud Rate Generator Register

0000 0000

Legend: x = unknown, - = unimplemented locations read as '0'. Shaded cells are not used for Asynchronous Reception.

Note 1:

Bits PSPIE and PSPIF are reserved on the PIC16C73/73A/76, always maintain these bits clear.

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