PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 11
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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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1.5
Table 1
Pin No. Symbol Function Descriptions
16
15
14
13
9
8
7
6
4
Semiconductor Group
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
DS
RD
R/W
WR
CS
ALE
A0
A1
A2
A3
Pin Description
Parallel Host Interface
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
I
I
Address Bits A(0:3) (demultiplexed bus type)
Multiplexed Bus Mode: Address/Data Bus. Transfers
addresses from the host to JADE and data between the
host and the JADE
Demultiplexed Bus Mode: Data bus. Transfers data
between the host and the JADE
Data Strobe.
The rising edge marks the end of a valid read or write
operation (Motorola bus mode).
Read.
This signal indicates a read operation (Siemens/Intel
bus mode).
Read/Write.
A 1 (“high”) identifies a valid host access as a read
operation. A 0 identifies a valid host access as a write
operation (Motorola bus mode)
Write.
This signal indicates a write operation (Siemens/Intel
bus mode).
Chip Select.
Address Latch Enable.
A “high” on this line indicates an address on AD(0:7)
(multipexed bus mode only). ALE also selects the
interface mode
11
Data Sheet 1998-07-01
Introduction
PSB 7238
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