ST7LITEU09 STMicroelectronics, ST7LITEU09 Datasheet - Page 110

• Manufacturer Part Number: ST7LITEU09
• Description: ST7ULTRALITE - 8-BIT MCU WITH 2K SINGLE VOLTAGE FLASH MEMORY, ADC, TIMERS
• Manufacturer: STMicroelectronics

Specifications of ST7LITEU09

• 2k Bytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• 128 Bytes Data Eeprom. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• Clock Sources: internal trimmable 8MHz RC oscillator, internal low power, low frequency RC oscillator or external clock
• Five Power Saving Modes: Halt, Auto Wake Up from Halt, Active-Halt, Wait and Slow
• One 8-bit Lite Timer (lt) With Prescaler Including: watchdog, 1 realtime base and 1 input capture

Electrical characteristics
Table 66.
1.
2. Configuration not recommended, all unused pins must be kept at a fixed voltage: using the output mode of the I/O for
3. The R
4. R
5. To generate an external interrupt, a minimum pulse width has to be applied on an I/O port pin configured as an external
Caution:
Note:
110/139
Symbol
t
t
t
example or an external pull-up or pull-down resistor (see
based on design simulation and technology characteristics, not tested in production. This value depends on V
temperature values.
Figure
interrupt source.
f(IO)out
r(IO)out
w(IT)in
Data based on characterization results, not tested in production.
C
PU
IO
not applicable on PA3 because it is multiplexed on RESET pin
PU
54).
pull-up equivalent resistor is based on a resistive transistor (corresponding I
I/O pin capacitance
Output high to low level fall
time
Output low to high level rise
time
External interrupt pulse time
(5)
General characteristics (continued)
Figure 52. Two typical applications with unused I/O pin
During normal operation the ICCCLK pin must be pulled- up, internally or externally
(external pull-up of 10k mandatory in noisy environment). This is to avoid entering ICC
mode unexpectedly during a reset
I/O can be left unconnected if it is configured as output (0 or 1) by the software. This has the
advantage of greater EMC robustness and lower cost.
Figure 53. Typical I
(1)
(1)
Parameter
V
DD
10k
PU
UNUSED I/O PORT
vs. V
60
50
40
30
20
10
0
C
Between 10% and 90%
ST7XXX
L
= 50 pF
DD
with V
-45°C
25°C
90°C
130°C
Conditions
Figure
IN
57). Static peak current value taken at a fixed V
=V
SS
Vdd [V]
10k
Min
UNUSED I/O PORT
PU
1
current characteristics described in
ST7XXX
ST7LITEU05 ST7LITEU09
Typ
25
25
5
Max
DD
IN
and
value,
t
Unit
CPU
pF
ns