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SH7052 Datasheet(PDF) 757 Page - Renesas Technology Corp

Part # SH7052
Description  SuperHTM RISC engine
PDF  919 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7052 Datasheet(HTML) 757 Page - Renesas Technology Corp

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731
20.11.5
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 polling uses the auto-erase operation end decision 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 20.19 AC Characteristics in Auto-Erase Mode (Conditions: V
CC = 3.3 V ±0.3 V,
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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