NEC 78014Y Series User Manual page 481

AD0 to AD7
AD0 to AD7
Internal wait signal
(1-clock wait)
www.DataSheet4U.com
AD0 to AD7
CHAPTER 19 EXTERNAL DEVICE EXPANSION FUNCTION
Figure 19-6. External Memory Read Modify Write Timing
(a) When without Wait (PW1, PW0 = 0, 0) Setup
ASTB
RD
WR
Low-order
address
A8 to A15
(b) When with Wait (PW1, PW0 = 0, 1) Setup
ASTB
RD
WR
Low-order
address
A8 to A15
(c) When External Wait (PW1, PW0 = 1, 1) Setup
ASTB
RD
WR
Low-order
address
A8 to A15
WAIT
Read data Write data
High-order address
Read data
High-order address
Read data
High-order address
Write data
Write data
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