HD64F38024HV Datasheet, PDF (208/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 6 ROM
6.10.5 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 6.18 shows the AC characteristics.
Table 6.18 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
WE rise time
WE fall time
Symbol
tnxtc
tceh
tces
tdh
tds
twep
tests
tspa
terase
tr
tf
Min
20
0
0
50
50
70
1
—
100
—
—
Max Unit
—
µs
—
ns
—
ns
—
ns
—
ns
—
ns
—
ms
150
ns
40000 ms
30
ns
30
ns
Notes
Figure 6.18
Rev. 8.00 Mar. 09, 2010 Page 186 of 658
REJ09B0042-0800