MAS3507D datasheet(22/60 Pages) MICRONAS

22 / 60 page

MAS 3507D

PRELIMINARY DATA SHEET

Micronas

3.3.6. Read Register

The MAS 3507D 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 MPEG decoding are described in

detail.

Example:

Read the content of the PIO data register ($c8):

<$3a><$68><$dc><$80>

<$3a><$69><$3b>

now read:

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

3.3.7. Read D0 Memory

The ‘read D0 memory’ command is provided to get

information from memory cells of the MAS 3507D. 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.

3.3.8. Read D1 Memory

The ‘read D1 memory’ command is provided to get

information from memory cells of the MAS 3507D. It

gives the controller access to all memory cells of the

internal D1 memory.

3.3.9. Default Read

The ‘default read’ command immediately returns the

content of the MPEGFrameCount (D0:$300) of the

MAS 3507D in the variable (d = d3,d2,d1,d0). The

‘default read’ command is the fastest way to get infor-

mation from the MAS 3507D. Executing the ‘default

read’ command in a polling loop can be used to detect

the availability of new ancillary data.

dev_write

A data_write A $D, r1 A

d3, d2

r0,$0

dev_write

data_read

A S

dev_read

A d1,d0

X,X

X, d4

Nak

1) send command

2) get register value

r1, r0: register r

d3...d0: data value in r

don’t care

dev_write

A data_write A $E, $0 A

d3, d2

$0,$0

dev_write

data_read

A S

dev_read

A d1,d0 A $0,$0 A $0, d4

1) send command

2) get memory value

n3,n2

n1,n0

A a3,a2 A a1,a0

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

n3..n0: number of words

a3..a0: start address in MASD memory

d4..d0: data value

d3, d2

A d1,d0

A $0,$0 A $0, d4

NaK

dev_write

A data_write A $F, $0 A

d3, d2

$0,$0

dev_write

data_read

A S

dev_read

A d1,d0

A $0,$0 A $0, d4

1) send command

2) get memory value

n3,n2

n1,n0

A a3,a2 A

a1,a0

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

n3..n0: number of words

a3..a0: start address in MASD memory

d4..d0: data value

d3, d2

A d1,d0

A $0,$0 A $0, d4

NaK

dev_write

data_read

A S device_read

A d3,d2

Nak

A d1,d0

MAS3507D Datasheet(PDF) 22 Page - Micronas

MAS3507D Datasheet(HTML) 22 Page - Micronas

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL