HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 220

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 6 Bus Controller
6.5.9
When DRAM with a ×16 configuration is connected, the 2-CAS system can be used for the
control signals required for byte access.
Figure 6.18 shows the control timing in the 2-CAS system, and figure 6.19 shows an example of
2-CAS type DRAM connection.
Rev.6.00 Sep. 27, 2007 Page 190 of 1268
REJ09B0220-0600
Byte control
Note: n = 2 to 5
Byte Access Control
Figure 6.18 2-CAS System Control Timing (Upper Byte Write Access)
CSn (RAS)
HWR (WE)
A
23
LCAS
to A
CAS
φ
0
T
p
Row
T
r
T
c1
Column
T
c2