h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 181

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

16-Bit, 2-State Access Space: Figures 6.7 to 6.9 show the bus timing for 16-bit, 2-state access
space. When 16-bit access space is accessed, the upper data bus (D15 to D8) is used for even
addresses and the lower data bus (D7 to D0) for odd addresses.
Wait states cannot be inserted.
Read
Write
AS/IOS (IOSE = 1)
AS/IOS (IOSE = 0)
Figure 6.7 16-Bit, 2-State Access Space Bus Timing (1)
Address bus
D15 to D8
D15 to D8
D7 to D0
D7 to D0
HWR
LWR
RD
(Even Address Byte Access)
T
1
Bus cycle
Rev. 3.00 Jan 18, 2006 page 153 of 1044
High
Undefined
Valid
T
2
Invalid
Valid
Section 6 Bus Controller
REJ09B0280-0300