Datasheet

ST72321Rx ST72321ARx ST72321Jx
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12.6 MEMORY CHARACTERISTICS
12.6.1 RAM and Hardware Registers
12.6.2 FLASH Memory
Notes:
1. Minimum V
DD
supply voltage without losing data stored in RAM (in HALT mode or under RESET) or in hardware reg-
isters (only in HALT mode). Not tested in production.
2. Data based on characterization results, not tested in production.
3. V
PP
must be applied only during the programming or erasing operation and not permanently for reliability reasons.
4. Data based on simulation results, not tested in production.
Warning: Do not connect 12V to V
PP
before V
DD
is powered on, as this may damage the device.
Symbol Parameter Conditions Min Typ Max Unit
V
RM
Data retention mode
1)
HALT mode (or RESET) 1.6 V
DUAL VOLTAGE HDFLASH MEMORY
Symbol Parameter Conditions Min
2)
Typ Max
2)
Unit
f
CPU
Operating frequency
Read mode 0 8
MHz
Write / Erase mode 1 8
V
PP
Programming voltage
3)
4.5V ≤ V
DD
≤ 5.5V 11.4 12.6 V
I
DD
Supply current
4)
RUN mode (f
CPU
= 4MHz) 3
mA
Write / Erase 0
Power down mode / HALT 1 10
µA
I
PP
V
PP
current
4)
Read (V
PP
=12V) 200
Write / Erase 30 mA
t
VPP
Internal V
PP
stabilization time 10 µs
t
RET
Data retention
T
A
=85°C 40
yearsT
A
=105°C 15
T
A
=125°C 7
N
RW
Write erase cycles
T
A
= 55°C 1000 cycles
T
A
= 85°C 100 cycles
T
PROG
T
ERASE
Programming or erasing tempera-
ture range
-40 25 85 °C