D12320VF25V Datasheet, PDF (712/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
AC Characteristics
Table 17.40 AC Characteristics in Auto-Program Mode
Conditions: V_CC = 3.3 V ±0.3 V, V_SS = 0 V, T_a = 25°C ±5°C
Item
Symbol
Min
Command write cycle
tnxtc
20
CE hold time
tceh
0
CE setup time
tces
0
Data hold time
tdh
50
Data setup time
tds
50
Write pulse width
twep
70
Status polling start time
twsts
1
Status polling access time tspa
—
Address setup time
tas
0
Address hold time
tah
60
Memory write time
twrite
1
WE rise time
tr
—
WE fall time
tf
—
Max
—
—
—
—
—
—
—
150
—
—
3000
30
30
Unit
μs
ns
ns
ns
ns
ns
ms
ns
ns
ns
ms
ns
ns
A18 to A0
CE
OE
WE
I/O7
I/O6
I/O5 to I/O0
Address stable
tces
tceh tnxtc
tnxtc
tf ^twep tr
t_as
tds
tdh
tah
Data transfer
1 byte to 128 bytes
H'40
twsts tspa
twrite
Programming operation
end identification signal
Programming normal
end identification signal
H'00
Figure 17.56 Auto-Program Mode Timing Waveforms
Rev.7.00 Feb. 14, 2007 page 678 of 1108
REJ09B0089-0700