SH7065 Datasheet, PDF (802/941 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Section 19 256 kB Flash Memory (F-ZTAT)
19.11.5 Auto-Erase Mode
1. Auto-erase mode supports only total 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 is used to identify the end of an auto-erase
operation).
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 19.18 AC Characteristics in Auto-Erase Mode
Conditions: V_CC = 3.3 V ±0.3 V, V_SS = 0 V, T_a = 25°C ±5°C
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
Status polling start time
Status polling access time
Memory erase time
Erase setup time
Erase end setup time
WE rise time
WE fall time
Symbol
tnxtc
tceh
tces
tdh
tds
twep
twsts
tspa
terase
tens
tenh
tr
tf
Min
20
0
0
50
50
70
1

100
100
100


Max
Unit

µs

ns

ns

ns

ns

ns

ms
150
ns
40000
ms

ns

ns
30
ns
30
ns
Notes
Rev. 5.00 Sep 11, 2006 page 780 of 916
REJ09B0332-0500