PIC16F913 datasheet(164/272 Pages) MICROCHIP

164 / 272 page

PIC16F917/916/914/913

DS41250E-page 162

Preliminary

FIGURE 14-1:

SSP BLOCK DIAGRAM

(SPI MODE)

To enable the serial port, SSPEN bit (SSPCON<5>)

must be set. To reset or reconfigure SPI mode:

• Clear bit SSPEN

• Re-initialize the SSPCON register

• Set SSPEN bit

This configures the SDI, SDO, SCK and SS pins as

serial port pins. For the pins to behave in a serial port

function, they must have their data direction bits (in the

TRISC register) appropriately programmed. This is:

• SDI must have TRISC<7> set

• SDO must have TRISC<4> cleared

• SCK (Master mode) must have TRISC<6>

cleared

• SCK (Slave mode) must have TRISC<6> set

•SS must have TRISA<5> set.

Read

Write

Internal

Data Bus

RC7/RX/

RC4/T1G/

RA5/AN2/

RC6/TX/CK/

SSPSR Reg

SSPBUF Reg

SSPM<3:0>

bit 0

Shift

Clock

SS Control

Enable

Edge

Select

Clock Select

TMR2 Output

TCY

Prescaler

4, 16, 64

TRISC<6>

Edge

Select

SCL/

Peripheral OE

SDA/SEG8

DT/SDI/

SDO/SEG11

C2OUT/SS/

SEG5

SCK/

SEG9

Note 1: When the SPI is in Slave mode with SS

pin control enabled (SSPCON<3:0> =

0100

), the SPI module will reset if the SS

pin is set to VDD.

2: If the SPI is used in Slave mode with

CKE = 1, then the SS pin control must be

enabled.

3: When the SPI is in Slave mode with SS pin

control enabled (SSPCON<3:0> = 0100),

the state of the SS pin can affect the state

read back from the TRISC<4> bit. The

peripheral OE signal from the SSP module

into PORTC controls the state that is read

back

from

the

TRISC<4>

bit

(see

Section 19.4

“DC

Characteristics:

PIC16F917/916/914/913-I

(Industrial)

PIC16F917/916/914/913-E

(Extended)”

for

information

PORTC).

read-modify-write instructions, such as

BSF,

are performed on the TRISC register

while the SS pin is high, this will cause the

TRISC<4> bit to be set, thus disabling the

SDO output.

PIC16F913 Datasheet(PDF) 164 Page - Microchip Technology

PIC16F913 Datasheet(HTML) 164 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL