CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
User’s Manual U12688EJ4V0UM00
133
Figure 5-4. On-Page/Off-Page Judgment for Page ROM Connection (2/2)
(b) In the case of 16 Mbit (2 M
××××
8) page ROM (8-word page access)
(c) In the case of 16 Mbit (1 M
××××
16) Page ROM (8-word page access)
a23
a22
a21
a20
a19
a18
a5
a4
a3
A23
A22
A21
A20
A19
A18
A5
A4
A3
A2
A1
A0
A19
Internal address latch
V850E/MS1
address output
Page ROM address
A18
A17
Off-page address
On-page address
Continuous reading possible:
16-bit data bus width
×
8 words
A4
A3
A2
A1
A0
MA5
0
MA4
0
MA3
1
PRC register setting
Comparison
a23
a22
a21
a20
a19
a18
a5
a4
a3
A23
A22
A21
A20
A19
A18
A5
A4
A3
A2
A1
A0
A
–
1
A19
Internal address latch
V850E/MS1
address output
Page ROM address
A18
A17
Off-page address
On-page address
Continuous reading possible:
8-bit data bus width
×
8 words
A4
A3
A2
A1
A0
MA5
0
MA4
0
MA3
0
PRC register setting
Comparison
Содержание V850E/MS1 UPD703100
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