M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 345

• 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

(3) Precautions on memory expansion
As described in
M37702, some considerations must be incorporated into circuit design as in the following cases:
time, t
shows an example of a Ready signal generating circuit (with Wait).
the chip select signal (CS
If the M37702’s t
Figure 17.1.8 shows an example of a Ready signal generating circuit (no Wait). Figure 17.1.9
Ready function is valid for the internal areas, so that the circuits in Figures 17.1.8 and 17.1.9 use
When using external memory that requires long access time, t
of the E signal
When using an external memory that outputs data within t
When using an external memory that outputs data for more than t
When using an external memory that requires a long access time, t
Lower f(X
Select software Wait. (Refer to section “12.2 Software Wait.”)
Use Ready function. (Refer to section “12.3 Ready function.”)
E signal
_
a(AD)
_
, examine the method described below.
IN
).
su(P1D/P2D-E)
to
below, if specifications of the external memory do not match those of the
___
cannot be satisfied because the external memory requires a long access
2
) to specify the area where Ready function is valid.
7702/7703 Group User’s Manual
pxz(E-P1Z/P2Z)
17.1 Memory expansion
pzx(E-P1Z/P2Z)
a(AD)
APPLICATION
after the falling edge of the
a(AD)
after the rising edge
17–11