MAS3506D datasheet(18/52 Pages) MICRONAS

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MAS 3506D

PRELIMINARY DATA SHEET

Micronas

3.3.5. Read SCH-Data (Code 8hex)

The availability of Service Control Header data is indi-

cated by the related status registers or the BC-

FRAME-SYNC.

The

instruction

parameters

are

embedded in the 3 nibbles o2..o0. The 6 MSBs indi-

cate half of the address offset counted in 16-bit words

where the read out of the SCH data shall start. The 6

LSBs indicate half of the number of 16-bit words that

are to be transmitted by the MAS 3506D.

Example:

If 4 words starting with SCH-word 10 shall be read out

the command parameters o2..o0 have to be set to:

Thus the command sequence that is to be sent to the

MAS 3506D is:

<3a

device write (MAS 3506D I2C-address)

data write

81 42>

code 8hex, 4 words from offset word 10

The data read sequence is then initialized by

<3a

DW (MAS 3506D write address)

data read

<3b

DR (MAS 3506D read address)

Then the MAS 3506D will send the SCH-values

dd dd

SCH10.h, SCH10.l

dd dd

SCH11.h, SCH11.l

dd dd

SCH12.h, SCH12.l

dd dd >

SCH13.h, SCH13.l

where SCHx.h/l refers to the high/low part of the xth

word of the SCH.

Common Parameters with Command-Code 8hex

Often the four nibbles defining start address and

amount to be transmitted (8hex, o2, o1, o0) may have

the following values:

– 80 04: Read 16 bytes (= 8 words, 6 LSBs = 4)

from the beginning (offset = 0, 6 MSBs = 0) of the

SCH (i.e. everything from the beginning up to ADF2)

– 81 01: Read 4 bytes (= 2 words, 6 LSBs = 1) start-

ing at 16 bytes (= 8 words, 6 MSBs = 4) offset (i.e.

one Service Component Control Field SCCF)

– 81 05: Read 20 bytes (= 10 words, 6 LSBs = 5)

starting at 16 bytes (= 8 words, 6 MSBs = 4) offset

(i.e. 5 Service Component Control Fields SCCF)

3.3.6. Write Register (Code 9hex)

The

controller

writes

the

20-bit

value

(d = d4,d3,d2,d1,d0) into the MAS 3506D register

(r = r1,r0). A list of registers needed for control pur-

poses is given in Table 3–10 on page 20.

Example: Writing the value 81234hex into the register

with the number aahex:

<3a 68 9a a8 12 34>

Table 3–9: SCH-command example

000

101

000

010

5 means offset of

(10 16-bit-words)/2

2 means amount of

(4 16-bit-words)/2

1) send command (Read D0)

2) get SCH-values

SDW

data_write

AAA

8,o2

o1,o0

SDW

data_read

d3,d2

d1,d0

d3,d2

d1,d0

....repeat for n data values....

SDW

data_write

9,r1

r0,d4

d3,d2

d1,d0

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