E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 187

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.3.6
The H8S/2655 Group can output chip select signals (CS
driven low when the corresponding external space area is accessed. In normal mode, only the CS
signal can be output.
Figure 6.3 shows an example of CS
Enabling or disabling of the CS
for the port corresponding to the particular CS
In ROM-disabled expansion mode, the CS
Pins CS
should be set to 1 when outputting signals CS
In ROM-enabled expansion mode, pins CS
reset, and so the corresponding DDR should be set to 1 when outputting signals CS
For details, see section 9, I/O Ports.
When areas 2 to 5 are designated as DRAM space, outputs CS
1
to CS
Chip Select Signals
Address bus
7
are placed in the input state after a power-on reset, and so the corresponding DDR
CS
Figure 6.3 CS
n
n
signal is performed by setting the data direction register (DDR)
n
CS
CS
CS
(n = 0 to 7) output timing.
n
Signal Output Timing (n = 0 to 7)
T
1
0
0
pin is placed in the output state after a power-on reset.
to CS
Area n external address
1
n
to CS
pin.
7
are all placed in the input state after a power-on
Bus cycle
7
.
T
2
Rev. 5.00 Sep 14, 2006 page 157 of 1060
0
to CS
2
7
) to areas 0 to 7, the signal being
to CS
T
5
3
are used as RAS signals.
Section 6 Bus Controller
REJ09B0331-0500
0
to CS
7
.
0