參數(shù)資料
型號: ISD-SR3000
文件頁數(shù): 18/120頁
文件大?。?/td> 1293K
代理商: ISD-SR3000
1-13
1—HARDWARE
ISD-SR3000
ISD
INTERFACE SIGNALS
Table 1-6:
1
ISD-SR3000 Extended Address Lines Interface Signals
Signal Name
Type
Source Unit/Signal
Description
D[7:0]
I/O
ISD-SR3000
Data Bus
A[7:1]
I
ISD-SR3000
Address Bus
IOCS
I
ISD-SR3000
I/O Expansion Chip Select to
access the I/O registers
EMCS
I
ISD-SR3000
Expansion Memory Chip select
DDIN / A16
I
ISD-SR3000
Serve as direction in I/O operation
of SR3000; otherwise is bit 16 of
address bus
A15
I
ISD-SR3000
Address line
WR[0:1]
I
ISD-SR3000
Write signal for external memory
AF[4:0]
O
To external Extended
memory
Extended Address bus
CFEN
O
To external Extended
memory
Extended Memory CS could use
for Flash CS
CREN
O
To external Extended
memory
Extended Memory CS could use
for ROM CS
CSEN
O
To external Extended
memory
Extended Memory CS could use
for RAM CS
EMWR
O
To external Extended
memory
Write signal to external SRAM
CSINTROM
O
To internal ROM
Chip select for internal ROM
(Added ROM for DSPM)
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