
UM013911-0607 Schematic Dia
rams
e
eve
opmen
User Manual
68
Figure 25. Schematic Diagram, #4 of 9—NOR Flash Device
Intel-Type
A20/A21 used for
16/32Mbit-Flash
Pin37=N.C.
for 4Mbit-
Flashes
Note: Must be pulled ’low’
externally for programming.
A22/A23
not used here
=
=
=
=
=
=
=
=
U3 IS NOT POPULATED
A[0..23]
D[0..7]
-CSFLASH
-RD
-WR
-RESFLASH
-CSFLASH
-RD
-WR
VPP
A13
VSS
A14
A19
A4
A0
A3
VDD
A6
A[0..23]
A7
A2
A11
A10
A18
A1
A17
A9
A8
A16
A5
A15
A20
-RESFLASH
A12
-FLASHWE
A21
D4DFLASH4
D3DFLASH3
D2DFLASH2
D1DFLASH1
D6DFLASH6
D5DFLASH5
D7DFLASH7
D0DFLASH0
D[0..7]
-WP
VDD
-FLASHWE
V3.3
GND
U2A
74LVC04/SO
12
U3
MT28F008B3VG
TSOP40.20MM
2521
2620
2719
2818
3217
3316
3415
3514
8
7
36
6
5
4
3
2
1
40
13
37 38
22
24
9
10
12
11
29
23
39
30
31
DQ0A0
DQ1A1
DQ2A2
DQ3A3
DQ4A4
DQ5A5
DQ6A6
DQ7A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19 N.C.
CE
OE
WE
RP
WP
VPP
N.C.
VSS
VSS
VDD
VDD
R2
0R
C8
100nF
R1
10K
D[0..7]
A[0..23]
-CSFLASH
-RD
-WR
-RESFLASH
-FLASHWE
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