參數(shù)資料
型號: μPD784038Y
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位微控制器)
文件頁數(shù): 51/70頁
文件大?。?/td> 464K
代理商: ΜPD784038Y
51
m
PD784035Y,784036Y,784037Y,784038Y
9. 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 MByte (refer to Figure 9-1).
Figure 9-1. Example of Local Bus Interface
9.1 Memory Expansion
The memory capacity can be expanded in seven steps, from 256 Bytes to 1 MByte, by connecting an external
program memory and data memory.
D
Latch
Pseudo SRAM
PROM
PD27C1001A
μ
Character
generator
PD24C1000
μ
Data bus
Address bus
Gate array
I/O expansion
Centronics I/F, etc.
PD784038Y
μ
A16-A19
RD
WR
REFRQ
AD0-AD7
ASTB
A8-A15
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