PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 14
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 5
Pin No. Symbol Function Descriptions
76
74
70
68
64
62
57
55
51
49
40
38
33
31
27
25
43
47
46
45
44
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
CD8
CD9
CD10
CD11
CD12
CD13
CD14
CD15
EA
CRD
CWR
CPS
CDS
External Memory Interface (for Development Purposes only) (cont’d)
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
O
O
O
O
I/O
C-Bus Data.
Data bus for external ROM or RAM. Is to be left NC if not
used.
External program Access enable
When “high”, an access to program address range
(0000
ROM. Access to 8000
memory via the External Memory Interface.
When “low”, an access to 0000
0000
accesses external program memory via the External
Memory Interface.
C-Bus Read to external memories.
Left NC if not used.
C-Bus Write to external memories.
Left NC if not used.
C-Bus Select line for external program memory.
Left NC if not used.
C-Bus Select line for external data memory.
Left NC if not used.
H
H
- 7FFF
- 7FFF
14
H
H
, normally reserved for on-chip software)
) fetches an instruction from on-chip
H
- FFFF
H
H
addresses external
- FFFF
Data Sheet 1998-07-01
H
(including
Introduction
PSB 7238
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