7721 Datasheet, PDF (429/577 Pages) List of Unclassifed Manufacturers – H Bridge Power Module

APPLICATION
16.1 Memory connection
(4) Example of DRAM connection (external bus width = 8 bits) 
M37721
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
BYTE
XIN
RAS
CAS
R/W
E
A16/D0
A17/D1
A18/D2
A19/D3
A20/D4
A21/D5
A22/D6
A23/D7
ALE
XOUT
25 MHz
V1
AC32
AC573^V2
D0
D1
D2
D3
D4 Q4
D5
D6 OE
D7 LE
8
M5M417800CJ-7
A0
V1 : Make sure that the propagation delay
A1
time is within 80 ns.
A2
V2 : Make sure that the propagation delay
A3
time is within 15 ns.
A4
A5
A6
Memory map
A7
00000016
SFR area
A8
A9
00008016 _Internal
A10
00047F16 RAM area
RAS
Not used
CAS
W
001FC016
SFR area
001FFF16
OE
D0 _DQ1
D1 _DQ2
D2 _DQ3
D3 _DQ4
D4 _DQ5
D5 _DQ6
D6 _DQ7
D7 _DQ8
Not used
E0000016
DRAM area
(M5M417800CJ)
FFFFFF16
Circuit condition : DRAM area select bits (bits 3 to 0 at address 6416) = “00102”
Fig. 16.1.22 Example of M5M417800CJ (2M ! 8 bits) connection (external bus width = 8 bits)
16–26
7721 Group User’s Manual