SH7014 datasheet(574/754 Pages) RENESAS

574 / 754 page

18. 128 kB Flash Memory (F-ZTAT)

Rev.5.00 Sep. 27, 2007 Page 540 of 716

REJ09B0398-0500

18.11.5

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 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 18.17 AC Characteristics in Auto-Erase Mode

Conditions:

CC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C

Item

Symbol

Min

Max

Unit

Notes

Command write cycle

nxtc

μs

CE hold time

ceh

CE setup time

ces

Data hold time

Data setup time

Write pulse width

wep

Status polling start time

ests

Status polling access time

spa

150

Memory erase time

erase

100

40000

Erase setup time

ens

100

Erase end setup time

enh

100

WE rise time

WE fall time

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