MAS3504D datasheet(15/40 Pages) MICRONAS

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MAS 3504D

Micronas

3.3.5. Read Register

The MAS 3504D has an address space of 256 regis-

ters. Some of the registers (r = r1, r0 in the figure

above) are direct control inputs for various hardware

blocks, others do control the internal program flow. In

the next section, those registers that are of any interest

with respect to the G.729 codec are described in

detail.

Example: Read the content of the PIO data register

(C8hex):

<$3A><$68><$DC><$80>

<$3A><$69><$3B>

now read:

<d3,d2><d1,d0><x,x><x,d4>

3.3.6. Read D0 Memory

The ‘read D0 memory’ command is provided to get

information from memory cells of the MAS 3504D. It

gives the controller access to all memory cells of the

internal D0 memory. Direct access to memory cells is

an advanced feature of the DSP. It is intended for

users of the MASC software development kit.

3.3.7. Read D1 Memory

The ‘read D1 memory’ command is provided to get

information from memory cells of the MAS 3504D. It

gives the controller access to all memory cells of the

internal D1 memory.

1) send command

2) get register value

SDW

data_write

D,r1

r0,$0

SDW

data_read

d3,d2

x,d4

d1,d0

x,x

r1, r0: register r

d3..d0: data value in r

x: don’t care

1) send command

2) get memory value

SDW

data_write

AAA

E,$0

0$,$0

SDW

data_read

d3,d2

d1,d0

n3,n2

n1,n0

a3,a2

a1,a0

$0,$0

$0,d4

d3,d2

d1,d0

$0,$0

$0,d4

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

n3..n0: number of words

a3..a0: start address in MASD memory

d4..d0: data value

1) send command

2) get memory value

SDW

data_write

F,$0

$0,$0

SDW

data_read

d3,d2

d1,d0

n3,n2

n1,n0

a3,a2

a1,a0

$0,$0

$0,d4

d3,d2

d1,d0

$0,$0

$0,d4

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

n3..n0: number of words

a3..a0: start address in MASD memory

d4..d0: data value

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