Pagerom Read Cycle (Wroma(3:0) = 0011, Wprom(2:0) = 001) - NEC VR4181 mPD30181 User Manual

(2) PageROM read cycle
Figure 6-4. PageROM Read Cycle (WROMA(3:0) = 0011, WPROM(2:0) = 001)
TClock
(internal)
ADD(21:0)
Adr0
(output)
ROMCS(3:0)#
(output)
MEMRD#
L
(output)
WROMA(3:0)
DATA(15:0)
(read)
Remark A circle in the figure indicates the sampling timing.
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CHAPTER 6 BUS CONTROL
Adr1 Adr2
WPROM(2:0) WPROM(2:0)
Data0 Data1 Data2
User's Manual U14272EJ3V0UM
Adr3 Adr4 Adr5
WPROM(2:0) WPROM(2:0) WPROM(2:0)
Data3 Data4
Adr6 Adr7
WPROM(2:0) WPROM(2:0)
Data5 Data6 Data7