NEC V850/SV1, Руководство пользователя

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CHAPTER 4 CAUTIONS
User’s Manual U14337EJ1V0UM00
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4.4 NMI Signal Mask Function
When using the P00/NMI pin in the port mode, do not mask the NMI signal.
4.5 Bus Interface Pin
The operation of the pin for the bus interface differs between the emulator and the target device as follows.
Table 4-1. Bus Interface Pin Operation List (1/2)
(a) During break
Internal Memory External Memory
Memory Used by
Emulator
Internal
ROM
Internal RAM Internal
Peripheral I/O
Emulation RAM Target System
Pin Name
F R W R R W R W R W R W
A16 to A21 Hold the last accessed address Active Active
AD0 to 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