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PDF PSB7230 Data sheet ( Hoja de datos )
| Número de pieza | PSB7230 | |
| Descripción | Joint Audio Decoder-Encoder for Analog Videophone JADE AN | |
| Fabricantes | Siemens Semiconductor Group | |
| Logotipo |  |
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ICs for Communications
Joint Audio Decoder-Encoder for Analog Videophone
JADE AN
PSB 7230 Version 2.1
Data Sheet 1998-07-01
DS 1
1 page  
Joint Audio Decoder-Encoder for Analog Videophone
JADE AN
PSB 7230
Version 2.1
1 Introduction
1.1 Feature List
Functions
– G.723 V5.1 Compression/Decompression (6.3,
5.3 Kbit/s)
– Accepts/outputs uncompressed audio in 8-bit PCM
A/µ law or 16-bit linear format
P-TQFP-100
– G.711 Compression/Decompression (64 Kbit/s)
– Uncompressed/compressed audio switchable between different interface
combinations (IOM® /Serial Audio Interface, IOM/Host, Host/Host)
– Inband controlled H.221/H.223 oriented audio protocol, e.g. for direct serial
connection to Videocodec (VCP of 8 × 8 Inc., formerly IIT Inc.) as well as host based
solutions
– Outband controlled audio protocol with optimized data rate
– Stable reaction on interrupt handshake timing violations of e.g. a slow host
(Windows® PC)
System On-Chip Functions
– One universal serial transparent data controller
– IOM-2 Monitor and C/I channels
– Generation of programmable system clock output
Interfaces
– 4-line IOM-2/PCM interface (programmable master or slave)
– 5-line serial audio interface, e.g. for connection to Videocodec/H.221/223 processor
– Parallel 8-bit Host interface
– 4-line general purpose interface
Type
PSB 7230
Semiconductor Group
Ordering Code
Q67101-H6864
5
Package
P-TQFP-100
Data Sheet 1998-07-01
5 Page 
PSB 7230
Introduction
Table 1
Parallel Host Interface (cont’d)
Pin No. Symbol Function Descriptions
17 INTR O (OD) Interrupt Real-time.
Interrupt output line for high priority interrupt status
(serial audio receive/transmit, serial HDLC data
receive/transmit data) to host.
18 INT O (OD) Interrupt Request.
Interrupt output line for all other interrupt states.
Table 2
IOM-2 Interface
Pin No. Symbol Function Descriptions
23 DD I/O(OD) Data Downstream on IOM-2/PCM interface.
22 DU I/O(OD) Data Upstream on IOM-2/PCM interface.
21 DCL I/O(OD) Data Clock.
Clock frequency is twice the data rate, or equal to the
data rate.
20 FSC I/O(OD) Frame Sync.
Marks the beginning of a physical IOM-2 or PCM frame.
Table 3
Serial Audio Interface
Pin No. Symbol Function Descriptions
1 SCLK I/O Serial Clock.
Serial clock for SR and ST.
100 SR
I/O(OD)
Serial Data Receive.
Should be connected to VSS via a pulldown resistor if not
used.
99 ST I/O(OD) Serial Data Transmit.
98 RFS I/O
Audio Receive Frame Sync.
97 TFS I/O
Audio Transmit Frame Sync.
Semiconductor Group
11 Data Sheet 1998-07-01
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet PSB7230.PDF ] | |
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