PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 12

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

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