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H8S/2214 Scheda tecnica(PDF) 652 Page - Renesas Technology Corp

Il numero della parte H8S/2214
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  936 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2214 Scheda tecnica(HTML) 652 Page - Renesas Technology Corp

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Section 15 ROM
Rev.4.00 Sep. 18, 2008 Page 592 of 872
REJ09B0189-0400
15.13.5
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 15.19 AC Characteristics in Auto-Erase Mode
Conditions: V
CC = 3.3 V ±3.0 V, VSS = 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
0
ns
CE setup time
t
ces
0
ns
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
1
ms
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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