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PSB7280 Datasheet(PDF) 13 Page - Siemens Semiconductor Group

Part # PSB7280
Description  Joint Audio Decoder-Encoder
PDF  190 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

PSB7280 Datasheet(HTML) 13 Page - Siemens Semiconductor Group

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PSB 7280
Semiconductor Group
13
Data Sheet 1998-07-01
Table 4
System Clocks
Pin No. Symbol Function Descriptions
90
XTAL1
I
Crystal In or Clock In.
If a crystal is used, it is connected between XTAL1 and
XTAL2. If a clock signal is provided (via an external
oscillator), this signal is input via XTAL1. In this case the
XTAL2 output is to be left non-connected. The XTAL1
input has to be 50% duty cycle and must not exceed the
voltage range between
V
SSA and VDDA.
91
XTAL2
O
Crystal Out.
Left unconnected if a crystal is not used.
86
CLKO
O
Clock Out.
Output clock of frequency equal to the internal
frequency divided by a programmable factor.
Table 5
External Memory Interface (for Development Purposes only)
Pin No. Symbol Function Descriptions
75
CA0
O
C-Bus Address.
73
CA1
O
Used for addressing ROM or RAM external to the chip.
69
CA2
O
Is to be left NC if not used.
67
CA3
O
63
CA4
O
61
CA5
O
56
CA6
O
54
CA7
O
50
CA8
O
48
CA9
O
39
CA10
O
37
CA11
O
32
CA12
O
30
CA13
O
26
CA14
O
24
CA15
O



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