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S.h.i – Motorola DSP56012 User Manual

Page 256

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B-24

DSP56012 User’s Manual

MOTOROLA

Programming Reference

Application:

Date:

Programmer:

Sheet 1 of 3

S.H.I.

*

= Reserved, write as 0

1

5

1

4

1

3

1

2

1

1

1

0

9876543210

HDM4

HDM2

HDM1

HDM0

HRS

CPOL

CPHA

SHI Clock Control

X:$FFF0

Reset = $000001

Register (HCKR)

19

18

17

16

23

22

21

20

*

0

*

0

HDM3

*

0

*

0

*

0

*

0

*

0

*

0

*

0

1

5

1

4

1

3

1

2

1

1

1

0

9876543210

SHI Slave Address

X:$FFF2

Reset = $Bx0000

Register (HSAR)

19

18

17

16

23

22

21

20

HA1

HA3

HA5

*

0

*

0

HA6

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

*

0

HA4

0

0

0

0

*

0

*

0

*

0

*

0

00

HDM5

HCKR Divider Modulus Select

HSAR I

2

C Slave Address

Slave address = Bits HA6-HA3, HA1 and external pins HA2, HA0

Slave address after reset = 1011_HA2_0_HA0

HFM1

HFM0

SHI Noise Reduction Filter Mode

0

0

Bypassed (Filter disabled)

0

1

Reserved

1

0

Narrow spike tolerance

1

1

Wide spike tolerance

HFM0

HFM1

SHI Clock Control Register (HCKR)

SHI Slave Address Register (HSAR)

CPOL

CPHA

Result

0

0

SCK active low, strobe on rising edge

0

1

SCK active low, strobe on falling edge

1

0

SCK active high, strobe on falling edge

1

1

SCK active high, strobe on rising edge

HRS

Result

0

Prescaler operational

1

Prescaler bypassed