參數(shù)資料
型號: μPD784035
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): 53/98頁
文件大?。?/td> 650K
代理商: ΜPD784035
53
μ
PD784035, 784036, 784037, 784038
10. LOCAL BUS INTERFACE
The local bus interface enables the connection of external memory and I/O devices (memory-mapped I/O). It
supports a 1M-byte memory space. (See
Figure 10-1
.)
Figure 10-1. Example of Local Bus Interface
10.1 Memory Expansion
By adding external memory, program memory or data memory can be expanded, 256 bytes at a time, to
approximately 1M byte (seven steps).
Data bus
Latch
Gate array for I/O
expansion including
Centronics interface
circuit, etc.
RD
WR
REFRQ
AD0-AD7
ASTB
Pseudo SRAM
PROM
PD27C1001A
μ
PD784038
μ
A16-A19
Address bus
A8-A15
D
Kanji character
generator
PD24C1000
μ
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