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SPI Packets

Host-to-Decoder Packet Descriptions

STEP TIME (ST)

This is the time the FLEXchip IC is to wait before applying the next state’s receiver control value to the receiver control lines. The setting is in steps of 625us. Valid values are 625 s (ST =01) to 79.375 ms (ST = 7F in hexadecimal) (The value after reset = 625 s).

3200 sps Sync Setting Packets

Table B-14 3200 sps Sync Setting Packet Bit Assignments

Byte

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

0

0

0

1

0

1

1

0

 

 

 

 

 

 

 

 

 

2

0

0

0

0

LBC

0

0

0

 

 

 

 

 

 

 

 

 

1

CLS7

CLS6

CLS5

CLS4

CLS3

CLS2

CLS1

CLS0

 

 

 

 

 

 

 

 

 

0

0

ST6

ST5

ST4

ST3

ST2

ST1

ST0

 

 

 

 

 

 

 

 

 

LOW BATTERY CHECK (LBC)

If this bit is set, the FLEXchip IC will check the status of the LOBAT port just before leaving this receiver state. The value after reset = 0.

CONTROL LINE SETTING (CLS)

This is the value to be output on the receiver control lines (S0–S7) for this receiver state. The value after reset = 0.

STEP TIME (ST)

This is the time the FLEXchip IC is to wait before expecting good signals on the EXTS1 and EXTS0 signals after warming up. The setting is in steps of 625 s.

Valid values are 625 s (ST = 01) to 79.375 ms (ST = 7F in hexadecimal). (The value after reset = 625 s.)

B-16

MC68175/D, Preliminary

MOTOROLA

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