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參數(shù)資料
| 型號： | ZR38650 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | PROGRAMMABLE DIGITAL AUDIO PROCESSOR |
| 中文描述： | 可編程數(shù)字音頻處理器 |
| 文件頁數(shù)： | 4/66頁 |
| 文件大?。?/td> | 441K |
| 代理商： | ZR38650 |
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4
ZR38650
Decoded audio outputs can be up to eight channels in bit-serial
DAC formats or six encoded channels from the S/PDIF
transmitter.
Memory
External memory is not normally needed but can be added for
program and/or digital audio data. Additional byte-wide program
storage gives different or additional functions when a host is not
used and allows a choice of ROM technologies to be employed
for future upgradability at minimum cost and parts count. Wider
32-bit program storage allows directly executing large functions
without downloading. External data memory may be required for
functions with long acoustical delays, input buffering or large
data tables.
FUNCTIONAL DESCRIPTION
A more complete description of the ZR38650 software’s opera-
tion and configurations and its hardware configurations follows.
Software - Operation
One of the major benefits of the ZR38650 is its ease of use for
the system developer under a broad range of system require-
ments. Standard functions are easy to use, yet custom features
can be added without falling back to custom software develop-
ment with complicated real-time operating system
considerations or detailed I/O protocols. This follows from the
fact that all software functions are supplied with a common
command and response sequence for use with a host or an API
(Application Programming Interface) for calling from an internal
program. And each provides for adding custom functions in not
just one but a series of ways which depend upon the complexity
of the custom function.
This is shown schematically in Figure 3 where the operation,
set-up, primary, and SiliconSoftwarefunctions are shown in the
middle. Using the system utilities to maintain the communica-
tions with the host, the host can issue a sequence of commands
with responses to control the ZR38650’s operation. The utilities
issue API calls to the functions. All of the software development
can be limited to the host microprocessor even when feature
types of variations in operation are based on getting information
back from the ZR38650’s operation.
Alternatively, the control information in the commands can be
entered in a sequence of API calls issued from a custom
program running internally on the ZR38650 processor. Now no
host is required.
With either a host command/response stream or API calls,
custom functions in native ZR38001 code can be added without
losing the benefits of the ease of use in the common structure.
Table 1 is a summary of the commands and responses for the
standard primary, operation and set-up functions. Note there are
read and write commands to the ZR38650 and responses back
from the ZR38650 to the host. Responses are due to commands
during normal operations that are in progress or from certain
specific commands with read commands following.
Set-up B
Operate B, Etc.
Set-up A
Operate A
Custom ZR38650
Control Program
Host Processor
With Control
Program
Function B
Function C, Etc.
Function A
Primary Decoding,
Test and
SiliconSoftware
Functions
Command Stream
PLAY Operation
STOP Operation
CFG Set-up, Etc.
Operation and
Set-Up Functions
SETIO Set-up
APIs
ZR38650 Resident Control Program
Host Resident Control Program
Monitor
System Functions
Figure 3. ZR38650 Operation Control: Commands from a Host or Calls from a ZR38650 Resident Program
Set-up A
APIs
Utilities
System Functions
Response Stream
Response A
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