參數(shù)資料
型號(hào): PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強(qiáng)綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 16/164頁
文件大小: 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 16
External Memory Interface
Pin No.
Symbol
In (I)
Out (O)
Function
75
73
69
67
63
61
56
54
50
48
39
37
32
30
26
24
76
74
70
68
64
62
57
55
51
49
40
38
33
31
27
25
43
CA0
CA1
CA2
CA3
CA4
CA5
CA6
CA7
CA8
CA9
CA10
CA11
CA12
CA13
CA14
CA15
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
CD8
CD9
CD10
CD11
CD12
CD13
CD14
CD15
EA#
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
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
I/O
I
C-Bus Address
Used for addressing ROM or RAM external to the chip.
For the recommended external memory configuration two 32Kx8 SRAMs are
connected to CA0 to CA14.
C-Bus Data
Data bus for external ROM or RAM.
For the recommended external memory configuration one 32Kx8 SRAM is
connected to CD0 to CD7 and the second SRAM is connected to CD8 to
CD15.
External program Access enable
Must be connected to VDD for regular operation.
C-Bus Read to external memories
This signal must be connected to the RD# input of the external SRAM.
47
CRD#
O
46
CWR#
O
C-Bus Write to external memories
This signal must be connected to the WR# input of the external SRAM.
45
CPS#
O
C-Bus Select line for external program memory
This signal must be connected to the CS# input of the external SRAMs.
44
CDS#
O
C-Bus Select line for external program memory
This signal is not used in ISAR V1.0 and must be left n.c.
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