h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 163

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

6.6.10
When DRAM with a ×16-bit configuration is connected, the 2-CAS access method is used for the
control signals needed for byte access. Figure 6.29 shows the control timing for 2-CAS access, and
figure 6.30 shows an example of 2-CAS DRAM connection.
Figure 6.29 2-CAS Control Timing (Write Access to Even Address: RAST = 0, CAST = 0)
Byte Access Control
φ
Address bus
D15 to D8
D7 to D0
(
(
(
)
)
)
T
p
Row address
High
High
T
r
T
c1
Column address
Rev. 2.00, 03/04, page 131 of 534
T
c2