ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 151

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

ST7DALIF2
20.10
20.10.1
RESET pin protection when LVD is disabled
When the LVD is disabled, it is recommended to protect the RESET pin as shown in
Figure 88
1.
2.
3.
4.
Figure 88. RESET pin protection when LVD is disabled.
Communication interface characteristics
SPI - serial peripheral interface
Subject to general operating conditions for V
Refer to I/O port characteristics for more details on the input/output alternate function
characteristics (SS, SCK, MOSI, MISO).
Table 88.
1/t
Symbol
Required
f
t
t
EXTERNAL
r(SCK)
SCK =
f(SCK)
CIRCUIT
c(SCK)
RESET
USER
The reset network protects the device against parasitic resets.
The output of the external reset circuit must have an open-drain output to drive the ST7
reset pad. Otherwise the device can be damaged when the ST7 generates an internal
reset (LVD or watchdog).
Whatever the reset source is (internal or external), the user must ensure that the level
on the RESET pin can go below the V
the reset will not be taken into account internally.
Because the reset circuit is designed to allow the internal RESET to be output in the
RESET pin, the user must ensure that the current sunk on the RESET pin (by an
external pull-up for example) is less than the absolute maximum value specified for
I
INJ(RESET)
SPI clock frequency
SPI clock rise and fall
time
and follow these guidelines:
SPI characteristics
Parameter
in
0.01μF
Section 20.2 on page
Master
Slave
Conditions
V
DD
f
f
CPU
CPU
128.
R
ON
IL
Filter
=8 MHz f
=8 MHz
DD
max. level specified in
, f
GENERATOR
OSC
PULSE
, and T
CPU
/128 =0.0625
Min
see I/O port pin description
A
0
unless otherwise specified.
Electrical characteristics
Section
WATCHDOG
ILLEGAL OPCODE
INTERNAL
RESET
f
f
CPU
CPU
Max
20.8. Otherwise
ST72XXX
/4 =2
/2 =4
151/171
MHz
Unit