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7721 Datasheet(PDF) 433 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) 433 Page - Renesas Technology Corp

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APPLICATION
7721 Group User’s Manual
16–30
16.1 Memory connection
(6)
Example of DRAM connection (external bus width = 16 bits) Œ
00000016
00008016
00047F16
001FC016
001FFF16
E0000016
FFFFFF16
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ16
M5M418160CJ-7
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
RAS
A16/D0
A17/D1
A18/D2
A19/D3
A20/D4
A21/D5
A22/D6
A23/D7
A8/D8
A9/D9
A10/D10
A11/D11
A12/D12
A13/D13
A14/D14
A15/D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
RAS
M37721
AC32
BYTE
XIN
XOUT
25 MHz
BHE
V2
ST0
ST1
CAS
BLE
E
R/W
AC157
1A
1B
2A
2B
SELECT
1Y
2Y
ST
LCAS
UCAS
OE
W
V1
SFR area
Internal
RAM area
DRAM area
(M5M418160CJ)
Circuit condition : DRAM area select bits (bits 3 to 0 at address 6416) = “0010 2”
V1 : Make sure that the
propagation delay time is
within 20 ns.
V2 : Make sure that the
propagation delay time is
within 7.5 ns.
SFR area
Not used
Not used
Memory map
Fig. 16.1.26 Example of M5M418160CJ (1M ! 16 bits) connection (external bus width = 16 bits)



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