HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 193

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

6.4.1
On-chip memory is accessed in one state. The data bus is 16 bits wide, permitting both byte and
word transfer instruction. Figure 6.4 shows the on-chip memory access cycle. Figure 6.5 shows the
pin states.
On-Chip Memory (ROM, RAM) Access Timing
Internal address bus
Read
access
Write
access
Figure 6.5 Pin States during On-Chip Memory Access
Address bus
AS
RD
HWR, LWR
Data bus
Figure 6.4 On-Chip Memory Access Cycle
Internal read signal
Internal data bus
Internal write signal
Internal data bus
High-impedance state
Unchanged
Bus cycle
High
High
High
T
1
Bus cycle
Address
T
Rev.3.00 Mar. 26, 2007 Page 151 of 772
1
Read data
Write data
Section 6 Bus Controller
REJ09B0355-0300