NEC IE-703017-MC-EM1, Руководство пользователя

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CHAPTER 4 CAUTIONS
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Table 4-1. Bus Interface Pin Operation List (2/2)
(b) During Run
Internal memory External memory
Internal ROM Internal RAM Internal
Peripheral I/O
Emulation RAM Target System
Pin name
F R F R W R W F R W F R W
A16-A21 Hold the accessed last Active Active
AD0-
AD15
Hi-Z Active Active
ASTB H Active Active
R/W H Active Active
DSTB H H Active
LBEN H Active Active
UBEN H Active Active
WAIT Invalid Maskable Maskable
HLDRQ Maskable Maskable Maskable
HLDAK H or L H or L H or L
WRL H H H Note
WRH H H H Note
RD H H
Note
H
Note Active
Remarks 1. F : Fetch
R : Read
W : Write
2. H : High-level output
L : Low-level output
Hi-Z : High-impedance