PIC16F819 Datasheet

IC型号：
PIC16F819
PDF描述：
18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Tech...
文件大小：
68.31KB
PDF页数：
176页
芯片厂家：
MICROCHIP

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PIC16F818/819

TABLE 10-2:

DATA TRANSFER RECEIVED BYTE ACTIONS

SSPSR

鈫?/div>

SSPBUF

Generate ACK Pulse

Set bit SSPIF

(SSP Interrupt occurs if enabled)

Yes

Status Bits as Data

Transfer is Received

Note 1:

SSPOV

Yes

Shaded cells show the conditions where the user software did not properly clear the overflow condition.

FIGURE 10-6:

C WAVEFORMS FOR RECEPTION (7-BIT ADDRESS)

SDA

Receiving Address R/W =

Receiving Data

ACK

A7 A6 A5 A4 A3 A2 A1

D7 D6 D5 D4 D3 D2 D1 D0

SCL

SSPIF (PIR1<3>)

Cleared in software

Bus master

terminates

transfer

BF (SSPSTAT<0>)

SSPBUF register is read

SSPOV (SSPCON<6>)

Bit SSPOV is set because the SSPBUF register is still full

ACK is not sent

FIGURE 10-7:

C WAVEFORMS FOR TRANSMISSION (7-BIT ADDRESS)

Receiving Address

R/W =

ACK

Transmitting Data

ACK

SDA

SCL

Data is

Sampled

SCL held low

while CPU

responds to SSPIF

SSPIF (PIR1<3>)

BF (SSPSTAT<0>)

CKP (SSPCON<4>)

Cleared in software

SSPBUF is written in software

From SSP Interrupt

Service Routine

Set bit after writing to SSPBUF

(the SSPBUF must be written to

before the CKP bit can be set)

DS39598D-page 78

Preliminary

铮?/div>

2003 Microchip Technology Inc.

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