M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 344

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATION
17.1 Memory expansion
17–10
Fig. 17.1.7 Timing at which data is written to an external memory
Table 17.1.5 Calculation formulas of t
Table 17.1.6 Constants of t
Parameter
Parameter
t
t
t
t
h(E—P1Q)
h(E—P2Q)
d(E—P1Q)
d(E—P2Q)
(2) Writing data
Address and data output
A
A
chip select signals
External memory
External memory
8
16
Figure 17.1.7 shows the timing at which data is written to an external memory.
When writing data, the output data starts after t
validated data is output continuously until t
Table 17.1.5 lists the calculation formulas of t
Data output at writing data must satisfy the data set up time, t
write to an external memory.
/D
/D
write signals
8
Microcomputer
–A
0
f(X
–A
type
15
IN
23
/D
)
/D
15
7
16 MHz version
This applies when the external data bus has a width of 16 bits (BYTE = “L”).
2
f(X
70
W, WE
1
CE, S
IN
f(X
)
d(E-P1Q/P2Q)
10
E
IN
9
8 MHz
)
– 12.5
25 MHz version
(unit: ns)
Address
7702/7703 Group User’s Manual
h(E-P1Q/P2Q)
45
t
8 MHz < f(X
d
(unit: ns)
(E-P1Q/P2Q)
h(E-P1Q/P2Q)
h(E-P1Q/P2Q)
2
1
d(E-P1Q/P2Q)
t
w(EL)
(The others are specifications of external memory.)
f(X
passes from rising of the E signal.
10
. Table 17.1.6 lists the constants of t
: Specifications of the M37702
IN
IN
t
9
Data
)
su
)
– 6.25
(D)
passes from falling of the E signal. Its
16 MHz
su(D)
, and the data hold time, t
16 MHz < f(X
Address
t
h
t
(D)
h
(E-P1Q/P2Q)
2
1
_
f(X
10
IN
9
IN
)
– 2
)
_
25 MHz
d(E-P1Q/P2Q)
h(D)
, for
.