h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 145

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

16-Bit, 2-State Access Space: Figures 6.13 to 6.15 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 even addresses, and the lower half (D7 to D0) for odd addresses. Wait states cannot be
inserted.
Notes: 1. n = 3 to 0
Figure 6.13 Bus Timing for 16-Bit, 2-State Access Space (Even Address Byte Access)
2. When RDNn = 0
Write
Read
φ
Address bus
D15 to D8
D7 to D0
D15 to D8
D7 to D0
T
1
Bus cycle
High
High impedance
Valid
Rev. 2.00, 03/04, page 113 of 534
T
2
Invalid
Valid