h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 156

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

Section 7 Bus Controller (BSC)
7.5.3
8-Bit, 2-State Access Space: Figure 7.5 shows the bus timing for an 8-bit, 2-state access space.
When an 8-bit access space is accessed, the upper half (D15 to D8) of the data bus is used. The
LWR pin is always fixed high. Wait states cannot be inserted.
Rev. 2.00 Dec. 05, 2005 Page 118 of 724
REJ09B0200-0200
Basic Timing
Read
Write
Figure 7.5 Bus Timing for 8-Bit, 2-State Access Space
Address bus
AS
RD
D15 to D8
D7 to D0
HWR
LWR
D15 to D8
D7 to D0
φ
T
1
Bus cycle
High
High impedance
Valid
T
2
Invalid
Valid