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H838532H bảng dữ liệu(PDF) 171 Page - Renesas Technology Corp

tên linh kiện H838532H
Giải thích chi tiết về linh kiện  16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series
PDF  508 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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H838532H bảng dữ liệu(HTML) 171 Page - Renesas Technology Corp

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Section 6 ROM
Rev. 1.00 May 30, 2008 Page 151 of 484
REJ09B0436-0100
6.7.5
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.
5. Table 6.14 shows the AC characteristics.
Table 6.14
AC Characteristics in Auto-Erase Mode
Conditions: V
CC = 3.3 V ±0.3 V, VSS = 0 V, Ta = 25°C ±5°C
Item
Symbol
Min
Max
Unit
Notes
Command write cycle
t
nxtc
20
—
µs
Figure 6.12
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
WE rise time
t
r
—
30
ns
WE fall time
t
f
—
30
ns



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