參數(shù)資料
型號(hào): UPD784218GC
廠商: NEC Corp.
英文描述: Connector assemblies, Network cables;
中文描述: 16-/8-bit的單晶片微控制器
文件頁(yè)數(shù): 51/92頁(yè)
文件大?。?/td> 617K
代理商: UPD784218GC
μ
PD784218, 784218Y
Data Sheet U12304EJ2V0DS00
51
10. LOCAL BUS INTERFACE
The local bus interface can connect an external memory or I/O (memory mapped I/O) and support a memory
space of 1 MB (refer to
Figure 10-1
).
Figure 10-1. Example of Local Bus Interface
(a) Multiplexed bus mode
μ
PD784218
RD
WR
A8 to A19
ASTB
AD0 to AD7
V
DD
Address latch
LE
Q0 to Q7
D0 to D7
OE
SRAM
CS
OE
WE
I/O1 to I/O8
A0 to A19
Data bus
Address bus
(b) Separate bus mode
V
DD
Address bus
SRAM
CS
Data bus
OE
WE
I/O1 to I/O8
A0 to A19
μ
PD784218
RD
WR
A0 to A19
AD0 to AD7
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