r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 232

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 Bus Controller (BSC)
(1)
Figure 6.21 shows the bus timing for an 8-bit, 2-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 cannot be inserted in the data cycle.
Rev. 1.00 Sep. 19, 2008 Page 204 of 1270
REJ09B0466-0100
8-Bit, 2-State Data Access Space
Read
Write
Notes: 1. n = 6, 7
Address bus
Figure 6.21 Bus Timing for 8-Bit, 2-State Data Access Space
D15 to D8
D15 to D8
2. When RDNn = 0
HWR
LWR
CSn
RD
AH
φ
Tma1
Address cycle
Address
Address
Tma2
T1
Data cycle
Write data
T2
Read
data