h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 161

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

16-Bit, 3-State Access Space: Figures 7.10 to 7.12 show bus timings for a 16-bit, 3-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 can be
inserted.
Read
Write
φ
Address bus
AS
RD
D15 to D8
D7 to D0
HWR
LWR
D15 to D8
D7 to D0
Figure 7.10 Bus Timing for 16-Bit, 3-State Access Space
(Even Address Byte Access)
T
1
High impedance
Bus cycle
High
T
2
Rev. 2.00 Dec. 05, 2005 Page 123 of 724
Valid
Section 7 Bus Controller (BSC)
T
3
Invalid
Valid
REJ09B0200-0200