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7733 bảng dữ liệu(PDF) 743 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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APPLICATIONS
7735 Group User’s Manual
17–17
17.1 Memory expansion
Fig. 17.1.10 Bus buffer usage example (2) (when a memory which requires a long data hold time for writing
is connected)
DIR
ALS245A
BYTE
16 MHz
E
D
Q
OC
ALS573
OC
DIR
A
B
E
DQ
OC
ALS573
ALE
A16, A17
OC
A
B
1D 1Q
1T
2D
2Q
2T
1
F74
F04
XIN
XOUT
ALS245A
A8/D8 to
A15/D15
M37735MHBXXXFP
A0/D0 to
A7/D7
g2
CNVSS
g2
RDE
WEH
RD
WO
WE
WEL
F32
F11 g1
Data bus (even)
Data bus (odd)
Address bus
These circuits make the rising edge of
the write signal earlier by 1/2
1
, so
that the write hold time is extended.
g1 Make sure that the propagation delay time is 20 ns or less.
Circuit conditions: Wait 1 is valid,
1
=
2
,
f(XIN)
8
,
f(XIN)
16
,
f(XIN)
f(XCIN)
or
2
g1, g2 Make sure that the following relationships are satisfied:
q The sum of propagation delay time of g1 and output disable time of g2 is 42.5 ns or less.
q The sum of propagation delay time of g1 and output enable time of g2 is 5 ns or more.



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