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SH7041A Fiches technique(PDF) 773 Page - Renesas Technology Corp

No de pièce SH7041A
Description  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
PDF  923 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7041A Fiches technique(HTML) 773 Page - Renesas Technology Corp

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735
22.11.5
Auto-Erase Mode
1. Auto-erase mode supports only entire memory erasing.
2. Do not perform a command write during auto-erasing..
3. Confirm normal end of auto-erasing by checking I/O6. Alternatively, status read mode can also
be used for this purpose (I/O7 status output uses the auto-erase operation end identification
pin).
4. Status polling I/O6 and I/O7 pin information is retained until the next command write. As long
as the next command write has not been performed, reading is possible by enabling
CE and
OE.
Table 22.17 AC Characteristics in Auto-Erase Mode (Conditions: V
CC = 5.0 V ±10%,
V
SS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Notes
Command write cycle
t
nxtc
20
µs
CE hold time
t
ceh
0ns
CE setup time
t
ces
0ns
Data hold time
t
dh
50
ns
Data setup time
t
ds
50
ns
Write pulse width
t
wep
70
ns
Status polling start time
t
ests
1ms
Status polling access time
t
spa
150
ns
Memory erase time
t
erase
100
40000
ms
Erase setup time
t
ens
100
ns
Erase end setup time
t
enh
100
ns
WE rise time
t
r
30
ns
WE fall time
t
f
30
ns



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