CHAPTER 7 MODE SETTING
❍ External data bus 16-bit mode (non-multiplex mode)
Figure 7.5-3 Access timing chart of external data bus 16-bit mode (non-multiplex mode)
P57/CLK
P53/WRH
P52/WRL
P51/RD
P50/ALE
A23 to 16
A15 to 08
A07 to 00
D15 to 08/
AD15 to 08
D07 to 00/
AD07 to 00
❍ External data bus 16-bit mode (multiplex mode)
Figure 7.5-4 Access timing chart of external data bus 16-bit mode (multiplex mode)
P57/CLK
P53/WRH
P52/WRL
P51/RD
P50/ALE
A23 to 16
A15 to 08
A07 to 00
D15 to 08/
AD15 to 08
D07 to 00/
AD07 to 00
174
Even-numbered
address word read
Read address
Read address
Read address
Read data
Read
Read address
(Port data)
(Port data)
Read address
Read address
Read data
Even-numbered
address word write
Write address
Write address
Write address
Write data
Write
Write address
Write address
Write address
Write data
Read address
Read address
Read address
Read
Read address
Read address
Read address