D12320VF25IV Datasheet, PDF (928/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 ROM
Table 19.59 AC Characteristics when Entering Another Mode from Memory Read Mode
Conditions: V_CC = 3.3 V ±0.3 V, V_SS = 0 V, T_a = 25°C ±5°C
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
WE rise time
WE fall time
Symbol
tnxtc
tceh
tces
tdh
tds
twep
tr
tf
Min
20
0
0
50
50
70
—
—
Max
—
—
—
—
—
—
30
30
Unit
µs
ns
ns
ns
ns
ns
ns
ns
A₁₈ to A₀
CE
OE
WE
I/O₇ to I/O₀
Memory read mode
Address stable
Other mode command write
t_nxtc
t_ces
t_ceh
t_f
t_wep
t_r
t_ds
t_dh
Note: Do not enable WE and OE at the same time.
Figure 19.79 Timing Waveforms when Entering Another Mode from Memory Read Mode
Rev.6.00 Sep. 27, 2007 Page 896 of 1268
REJ09B0220-0600