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7721 Datasheet(PDF) 429 Page - Renesas Technology Corp

Part # 7721
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Datasheet(HTML) 429 Page - Renesas Technology Corp

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APPLICATION
7721 Group User’s Manual
16–26
16.1 Memory connection
(4)
Example of DRAM connection (external bus width = 8 bits) 
Fig. 16.1.22 Example of M5M417800CJ (2M ! 8 bits) connection (external bus width = 8 bits)
00000016
00008016
00047F16
001FC016
001FFF16
E0000016
FFFFFF16
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
M5M417800CJ-7
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
RAS
CAS
R/W
E
A16/D0
A17/D1
A18/D2
A19/D3
A20/D4
A21/D5
A22/D6
A23/D7
ALE
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
RAS
CAS
OE
M37721
XIN
XOUT
25 MHz
AC32
BYTE
D0
D1
D2
D3
D4
D5
D6
D7
AC573
LE
OE
Q4
D0
D1
D2
D3
D4
D5
D6
D7
V1
V2
8
W
SFR area
Internal
RAM area
DRAM area
(M5M417800CJ)
Memory map
Circuit condition : DRAM area select bits (bits 3 to 0 at address 6416) = “00102”
V1 : Make sure that the propagation delay
time is within 80 ns.
V2 : Make sure that the propagation delay
time is within 15 ns.
SFR area
Not used
Not used



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