h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 188

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Bus Controller
16-Bit 2-State Access Space: Figures 7.7 to 7.9 show bus timings for a 16-bit 2-state access
space. When a 16-bit access space is accessed, the upper half (D15 to D8) of the data bus is used
for the even address, and the lower half (D7 to D0) for the odd address.
Wait states cannot be inserted.
Rev. 5.00 Sep 22, 2005 page 162 of 1136
REJ09B0257-0500
Figure 7.7 Bus Timing for 16-Bit 2-State Access Space (1) (Even Address Byte Access)
Read
Write
Address bus
D15 to D8
D15 to D8
D7 to D0
D7 to D0
HWR
LWR
RD
AS
T
1
Bus cycle
High
High impedance
Valid
T
2
Invalid
Valid