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MAS3504D 데이터시트(PDF) 14 Page - Micronas

부품명 MAS3504D
상세설명  G.729 Annex A Voice Codec
PDF  40 Pages
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제조업체  MICRONAS [Micronas]
홈페이지  http://www.micronas.com
Logo MICRONAS - Micronas

MAS3504D 데이터시트(HTML) 14 Page - Micronas

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MAS 3504D
14
Micronas
3.3. Detailed MAS 3504D Command Syntax
3.3.1. Run
The ‘run’ command causes the start of a program part
at address a = (a3, a2, a1, a0). The nibble a3 is
restricted to 0hex or 1hex which also acts as command
selector. Run with address a=0hex will suspend the
encoding/decoding function and only I2C commands
are evaluated. This freezing is required if alternative
software is downloaded into the internal RAM of the
MAS 3504D. Detailed information about downloading
is provided in combination with a MAS 3504D software
development package or together with MAS 3504D
software modules available from Micronas.
Example: ‘run’ at address 1hex (start of G.729 decoder)
has the following I2C protocol:
<$3A><$68><$00><$01>
3.3.2. Write Register
The
controller
writes
the
20-bit
value
(d = d4, d3, d2, d1, d0) into the MAS 3504D register
(r = r1,r0). In contrast to memory cells, registers are
always addressed individually, and they may also
interact with built-in hardware blocks. A list of registers
is given in Section 3.5. on page 16
Example: G.729 decoding is started by writing the
value 1 into the register with the number FDhex:
<$3A><$68><$9F><$D1><$00><$00>
3.3.3. Write D0 Memory
The MAS 3504D has 2 memory areas of 2048 words
each called D0 and D1 memory. For both memory
areas, read and write commands are provided.
Example: writing one word to address d0:0321hex has
the following I2C protocol:
<$3A><$68><$A0><$00> (write D0 memory)
<$00><$01>
(1 word to write)
<$03><$21>
(start address)
<$23><$45>
(value = 12345hex)
<$00><$01>
3.3.4. Write D1 Memory
For further details, see ‘write D0 memory’ command.
SDW
data_write
W
AAA
W
A
P
a3,a2
a1,a0
SDW
data_write
W
AAA
W
A
9,r1
r0,d4
AW
A
P
d4,d3
d2,d1
SDW
data_write
A,0
$0,$0
P
n3,n2
n1,n0
a3,a2
a1,a0
d3,d2
d1,d0
d3,d2
d1,d0
....repeat for n data values....
WA
A
A
W
A
A
W
A
A
W
A
A
W
A
A
W
$0,$0
$0,d4
A
A
W
$0,$0
$0,d4
A
A
WA
n3..n0: number of words to be transmitted
a3..a0: start address in MASD memory
d4..d0: data value
SDW
data_write
B,0
$0,$0
P
n3,n2
n1,n0
a3,a2
a1,a0
d3,d2
d1,d0
d3,d2
d1,d0
....repeat for n data values....
WA
A
A
W
A
A
W
A
A
W
A
A
W
A
A
W
$0,$0
$0,d4
A
A
W
$0,$0
$0,d4
A
A
WA
n3..n0: number of words to be transmitted
a3..a0: start address in MASD memory
d4..d0: data value



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