PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 7

• Manufacturer Part Number: PSB7238
• Description: Joint Audio Decoder-Encoder - Multimode
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

System On-chip Functions
– Two universal serial HDLC/transparent data controllers
– IOM-2 monitor and C/I channels
– Generation of programmable system clock output
– Three programmable timers
– Programmable on-chip PLL for internal clock generation from ISDN low frequency
Joint Audio Decoder-Encoder - Multimode
Version 2.1
1.2
Functions
– G.728 compression/decompression (16 Kbit/s)
– G.723 compression/decompression (6.3, 5.3 Kbit/s)
– G.722 compression/decompression for 7-kHz audio
– G.711 compression/decompression (64 Kbit/s)
– Outband controlled audio protocol with optimized
– Digital sampling rate conversion (16 kHz - 8 kHz) for G.722 audio with 8-kHz Codec
– Accepts/outputs uncompressed audio in 8-bit PCM A/ law or 16-bit linear format
– Uncompressed/compressed audio switchable between different interface
– Inband controlled H.221/H.223 oriented audio protocol, e.g. for direct serial
– Stable reaction on interrupt handshake timing violations of e.g. a slow host
Type
PSB 7238
Semiconductor Group
(64, 56, 48 Kbit/s)
data rate
(bandwidth reduced to 3.4 kHz)
combinations (IOM/Serial Audio Interface, IOM/Host, Host/Host)
connection to videocodec (VCP of 8 8 Inc., formerly IIT Inc.) as well as host based
solutions
(Windows
(7.68 MHz) clock
Feature List
®
PC)
Ordering Code
Q67101-H6773
7
Package
P-TQFP-100
P-TQFP-100
Data Sheet 1998-07-01
PSB 7238