E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 205

• 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

6.5.7
When DRAM is accessed, RAS precharging time must be secured. With the H8S/2655 Group, one
T
setting the TPC bit in MCR to 1. Set the appropriate number of T
connected and the operating frequency of the H8S/2655 Group. Figure 6.16 shows the timing
when two T
When the TCP bit is set to 1, two T
p
state is always inserted when DRAM space is accessed. This can be changed to two T
Note: n = 2 to 5
Read
Write
Precharge State Control
p
HWR, LWR
HWR, LWR
CS
(UWE, LWE)
states are inserted.
(UWE, LWE)
D
D
A
Figure 6.16 Timing with Two Precharge States (2-WE System)
n
15
23
15
(RAS)
to D
to D
to A
CAS
0
0
0
T
p1
p
states are also used for refresh cycles.
T
p2
Rev. 5.00 Sep 14, 2006 page 175 of 1060
Row
T
r
p
cycles according to the DRAM
T
Column
c1
Section 6 Bus Controller
REJ09B0331-0500
T
c2
p
states by