HD64F2149 Datasheet, PDF (104/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

ø
Internal address bus
Read
access
Internal read signal
Internal data bus
Write
access
Internal write signal
Internal data bus
Bus cycle
T1
Address
Read data
Write data
Figure 2.17 On-Chip Memory Access Cycle
Bus cycle
T1
ø
Address bus
Unchanged
AS
High
RD
High
HWR, LWR
High
Data bus
High impedance
Figure 2.18 Pin States during On-Chip Memory Access
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