HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 598

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 18 ROM (128 kB Version)
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 D6. Alternatively, status read mode can also
4. Status polling D6 and D7 pin information is retained until the next command write. As long as
Table 18.16 AC Characteristics in Auto-Erase Mode
Conditions: V
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
Rev. 5.00 Jan 06, 2006 page 578 of 818
REJ09B0273-0500
be used for this purpose (D7 status polling uses the auto-erase operation end identification
pin).
the next command write has not been performed, reading is possible by enabling CE and OE.
CC
= 5.0 V ±10%, V
SS
= 0 V, T
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
nxtc
ceh
ces
dh
ds
wep
ests
spa
erase
ens
enh
r
f
a
= 25°C ±5°C
20
0
0
50
50
70
1
100
100
100
Min
Max
150
40000
30
30
Unit
µs
ns
ns
ns
ns
ns
ms
ns
ms
ns
ns
ns
ns
Notes