XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 342

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

Electrical Specifications
19.12 FLASH EEPROM Characteristics
19.12.1 Programming Voltage Supply Envelope
Data Sheet
342
Program/erase supply voltage
Program/erase supply current
Number of programming pulses
Programming pulse
Program to verify time
Program margin
Number of erase pulses
Erase pulse
Erase to verify time
Erase margin
Program/erase endurance
Data retention
1. V
2. The number of margin pulses required is the same as the number of pulses used to program or erase.
Read only
Program/erase/verify
Word program (V
Erase (V
DD
= 5.0 Vdc ± 10%, V
FP
NOTE:
= 12 V)
FP
Characteristic
= 12 V)
The key to preventing damage to the FLASH array or corruption of the data
contained in the memory is the programming voltage envelope shown in
Figure
devices are due to a failure to ensure that their voltage sources always meet
these requirements.
The most important single thing to remember from this diagram is that V
should always be at the same level, except during an actual program or erase
cycle. Corruption of FLASH data is often encountered when V
exceed V
Conversely, if V
damage to the FLASH array can occur.
Although
normal read phase, V
example, If the operating voltage of V
lower than 4.85 volts.
SS
= 0 Vdc, T
19-1. Many of the problems that customers experience with FLASH
DD
(1)
Figure 19-1
A
during the power-up and power-down phases.
= T
FP
L
to T
is allowed to fall below 0.35 volts lower than V
Electrical Specifications
H
, unless otherwise noted
FP
shows a lower boundary of 4.15 volts on V
always must be no more than .35 volts below V
Symbol
t
t
t
t
VERASE
PPULSE
EPULSE
VPROG
V
n
n
I
p
e
FP
PP
EP
FP
m
m
DD
in the system is 5.2 volts, V
V
DD
100
100
11.4
Min
100
20
10
10
—
—
—
5
1
−0.35
(2)
(3)
12.0
Typ
V
—
—
—
—
—
—
—
—
—
—
—
M68HC12B Family — Rev. 8.0
DD
FP
V
DD
is allowed to
FP
DD
Max
12.6
30
50
25
10
—
—
—
—
—
—
4
5
+0.5
during the
at any time,
FP
FP
can be no
MOTOROLA
DD
and V
Pulses
Pulses
Cycles
Units
Years
. For
mA
ms
ms
µs
µs
%
%
V
DD