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7733 Scheda tecnica(PDF) 763 Page - Renesas Technology Corp

Il numero della parte 7733
Spiegazioni elettronici  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Scheda tecnica(HTML) 763 Page - Renesas Technology Corp

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LOW VOLTAGE VERSION
7735 Group User’s Manual
18-15
18.6.2 Memory expansion example
Figure 18.6.3 shows a memory expansion example and Figure 18.6.4 shows the corresponding timing
diagram.
In this example, an Atmel company’s EPROM (AT27LV256R) is used as the external ROM.
Fig. 18.6.3 Memory expansion example
XIN
XOUT
M37735MHLXXXHP
BYTE
Data bus
HC573
DQ
E
RD
D0
to D7
AT27LV256R-15DI
D0 to D7
OE
A0 to A14
CE
A0
to A14
S1
A0 to A16
DQ1 to DQ8
OE
W
A0 to A16
D0 to D7
M5M51008AFP-15VLL
WR
Address bus
A0/D0 to A7/D7
ALE
RDE
CNVSS
WEL
CS1
CS2
000016
008016
087F16
800016
FFFF16
4000016
5FFFF16
External ROM area
(AT27LV256R-15DI)
SFR area
Internal RAM area
External RAM area
(M5M51008AFP-15VLL)
Memory map
Not used
Not used
A8 to A16
10 MHz
g
Circuit conditions : Wait 1
g Make sure that the propagation delay time is 85 ns (max.) or less.
1
=
,
,
, or
2
f(XIN)
8
f(XIN)
16
f(XIN)
2
f(XCIN)
Supply voltage : Vcc = 3.0 to 5.5 V
(Can operate with no wait when f(XIN)
≤ 8.0 MHz.)
18.6 Applications



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