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MC9S12VR-Family - Data Sheet - Freescale Semiconductor

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SPI Electrical Specifications<br />

SS<br />

(INPUT)<br />

SCK<br />

(CPOL = 0)<br />

(INPUT)<br />

SCK<br />

(CPOL = 1)<br />

(INPUT) 10<br />

MISO<br />

(OUTPUT)<br />

MOSI<br />

(INPUT)<br />

7<br />

NOTE: Not defined!<br />

2<br />

5 6<br />

MSB IN<br />

4<br />

1<br />

4<br />

9<br />

SLAVE MSB BIT 6 . . . 1<br />

SLAVE LSB OUT<br />

BIT 6 . . . 1<br />

Figure K-4. SPI Slave Timing (CPHA=0)<br />

In Figure K-5. the timing diagram for slave mode with transmission format CPHA=1 is depicted.<br />

SS<br />

(INPUT)<br />

SCK<br />

(CPOL = 0)<br />

(INPUT)<br />

SCK<br />

(CPOL = 1)<br />

(INPUT)<br />

MISO<br />

(OUTPUT)<br />

MOSI<br />

(INPUT)<br />

NOTE: Not defined!<br />

see<br />

note<br />

see<br />

note<br />

7<br />

1<br />

5 6<br />

MSB IN<br />

Figure K-5. SPI Slave Timing (CPHA=1)<br />

<strong>MC9S12VR</strong> <strong>Family</strong> Reference Manual, Rev. 2.8<br />

552 <strong>Freescale</strong> <strong>Semiconductor</strong><br />

12<br />

12<br />

11<br />

LSB IN<br />

2 12 13<br />

4<br />

9<br />

SLAVE<br />

4<br />

12 13<br />

11<br />

MSB OUT BIT 6 . . . 1<br />

SLAVE LSB OUT<br />

BIT 6 . . . 1<br />

13<br />

13<br />

11<br />

3<br />

3<br />

LSB IN<br />

see<br />

note<br />

8<br />

8

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