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參數(shù)資料
| 型號： | SAA2013 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Adaptive allocation and scaling for PASC coding in DCC systems |
| 中文描述： | 自適應(yīng)分配和戴納信貸混凝劑縮放系統(tǒng)編碼 |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 137K |
| 代理商： | SAA2013 |
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May 1994
12
Philips Semiconductors
Preliminary specification
Adaptive allocation and scaling for PASC
coding in DCC systems
SAA2013
A
DDRESS MODE
Address mode is entered by the master pulling L3MODE
LOW. This causes the L3DATA line to act as an input on
the slave, and 8 bits of address data are clocked into the
slave. If the slave recognizes the address, it will set-up its
internal state based on the 2 Least Significant Bits (LSBs)
of the address. The slave than expects to send status data
or receive control data.
The addresses for SAA2013 are shown in Table 4.
Table 4
SAA2013 addresses.
The interface may be reset by sending an address of all
zeros (‘00000000’). This may be used to allow
inter-operation with other devices sharing the L3CLK and
L3DATA lines (e.g. SAA7345 CD decoder).
D
ATA MODE
In data mode, bytes of data are clocked into (e.g. control)
or out of (e.g. status) the slave. A single byte transfer is
shown in Fig.9. A two byte transfer is shown in Fig.10,
between bytes there must be a pause during which the
clock remains HIGH.
MSB
LSB
L3 OPERATION
MODE
FUNCTION
0010
0010
0010
0010
0000
0001
0010
0011
WDAT
RDAT
WCMD
RSTAT
extended settings
allocation information
settings
status/peak read
H
ALT MODE
Halt mode consists of pulling L3MODE LOW after sending
data. It is used for marking the end of a data transfer mode
which does not have an internal bit counter.
SAA2013 interface modes
The SAA2013 may be used to read and write from or to
SAA2003. Information is transferred via a set of transit
registers within SAA2013.
D
ECODE OPERATION
During decode, the SAA2013 does not perform allocation.
Therefore no allocation and scale factor indices are sent to
SAA2003. Settings and extended settings may still be sent
to SAA2003, and SAA2013 monitors the status of the
codec by reading status from it after every occurrence of
FSYNC. Peak level data can also be transferred from
SAA2003.
E
NCODE OPERATION
In encode, the same information may be sent as for
decode, and in addition, allocation/scale factor indices are
sent to the codec by SAA2013.
The interface modes are shown in Table 5.
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