r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 223

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

(2)
Figure 6.11 shows the bus timing for an 8-bit, 3-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 can be inserted.
Notes: 1. n = 0 to 7
8-Bit, 3-State Access Space
Read
Write
2. When RDNn = 0
φ
Address bus
CSn
AS
RD
D15 to D8
D7 to D0
HWR
LWR
D15 to D8
D7 to D0
Figure 6.11 Bus Timing for 8-Bit, 3-State Access Space
T
1
High impedance
Bus cycle
High
T
2
Valid
Rev. 1.00 Sep. 19, 2008 Page 193 of 1342
Section 6 Bus Controller (BSC)
T
3
Invalid
Valid
REJ09B0467-0100