r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 222

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

Section 6 Bus Controller (BSC)
6.5.3
(1)
Figure 6.10 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 can be inserted.
Rev. 1.00 Sep. 19, 2008 Page 192 of 1342
REJ09B0467-0100
8-Bit, 2-State Access Space
Notes: 1. n = 0 to 7
Basic Timing
2. When RDNn = 0
Read
Write
Figure 6.10 Bus Timing for 8-Bit, 2-State Access Space
Address bus
CSn
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