r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 237

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

(2)
Figure 6.22 shows the bus timing for an 8-bit, 3-state data access space. When an 8-bit access
space is accessed, the upper halves (D15 to D8) of both the address bus and data bus are used.
Wait states can be inserted in the data cycle.
Read
Write
8-Bit, 3-State Data Access Space
Notes: 1. n = 6, 7
Address bus
D15 to D8
D15 to D8
2. When RDNn = 0
Figure 6.22 Bus Timing for 8-Bit, 3-State Data Access Space
HWR
LWR
CSn
RD
AH
φ
Tma1
Address cycle
Address
Address
Tma2
T1
Rev. 1.00 Sep. 19, 2008 Page 207 of 1342
Data cycle
T2
Section 6 Bus Controller (BSC)
Write data
T3
REJ09B0467-0100
Read
data