PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 12
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PSB7238
Manufacturer Part Number
PSB7238
Description
Joint Audio Decoder-Encoder - Multimode
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PSB7238.pdf
(190 pages)
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Semiconductor Group
Table 1
Pin No. Symbol Function Descriptions
17
18
Table 2
Pin No. Symbol Function Descriptions
23
22
21
20
Table 3
Pin No. Symbol Function Descriptions
1
100
99
98
97
INTR
INT
DD
DU
DCL
FSC
SCLK
SR
ST
RFS
TFS
Parallel Host Interface (cont’d)
Serial Audio Interface
IOM
®
O (OD)
O (OD)
I/O(OD)
I/O(OD)
I/O(OD)
I/O(OD)
I/O
I/O(OD)
I/O(OD)
I/O
I/O
-2 Interface
Interrupt Real-time.
Interrupt output line for high priority interrupt status
(serial audio receive/transmit, serial HDLC data
receive/transmit data) to host.
Interrupt Request.
Interrupt output line for all other interrupt states.
Data Downstream on IOM-2/PCM interface.
Data Upstream on IOM-2/PCM interface.
Data Clock.
Clock frequency is twice the data rate, or equal to the
data rate.
Frame Sync.
Marks the beginning of a physical IOM-2 or PCM frame.
Serial Clock.
Serial clock for SR and ST.
Serial Data Receive.
Should be connected to
used.
Serial Data Transmit.
Audio Receive Frame Sync.
Audio Transmit Frame Sync.
12
V
SS
via a pulldown resistor if not
Data Sheet 1998-07-01
Introduction
PSB 7238
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