NEC IE-703002-MC, Руководство пользователя

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CHAPTER 6 CAUTIONS
User’s Manual U11595EJ5V0UM
50
Table 6-3. Bus Interface Pin Operation List (2/2)
(b) During run
Internal Memory External Memory
Internal ROM Internal RAM Internal I/O
Emulation RAM
(IE-703002-MC)
Target System
Pin Name
F R F R W R W F R W F R W
A16 to A19 Retains the address accessed last
AD0 to AD15 Hi-Z
ASTB H
R/W H
Active
DSTB H H
LBEN H
UBEN H
Active
Active
WAIT Invalid
HLDRQ Valid
Valid Valid
HLDAK H or L H or L H or L
ST0 L L L
ST1 L
Note
H
Note
H
Note ST0, ST1 = H, L or ST0, ST1 = L, H
Remarks 1. F: Fetch
R: Read
W: Write
2. H: High-level output
L: Low-level output
Hi-Z: High impedance
6.8 Operating Frequency of IE-703002-MC
The IE-703002-MC is provided with a 6.667 MHz crystal oscillator when shipped from the factory (maximum
frequency: 33 MHz).
If this emulator is used to develop application systems using the V852, replace the oscillator with an oscillator of
following frequency in accordance with the clock mode setting (refer to 2.2 Clock Setting ).
Table 6-4. List of Oscillator Frequencies for Clock Modes
Clock Mode Crystal Oscillator Frequency
×
5 multiplication 5 MHz PLL mode
×
1 multiplication 25 MHz
Direct mode 50 MHz
When the IE-703002-MC is used for developing application systems using V850/Sxx products by connecting an
option board, apply the settings specified in the user’s manual of the option board used.