ST10F272M-4T3 STMicroelectronics, ST10F272M-4T3 Datasheet - Page 105

• Manufacturer Part Number: ST10F272M-4T3
• Description: MCU 16BIT 256K FLASH 144-LQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F272M-4T3

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-MQFP, 144-PQFP
• Processor Series: ST10F27x
• Core: ST10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

ST10F272M
21.3.2
21.3.3
Exiting stand-by mode
After the system has entered the stand-by mode, the procedure to exit this mode consists of
a standard power-on sequence, with the only difference that the RAM is already powered
through V
It is recommended to held the device under reset (RSTIN pin forced low) until external V
voltage pin is stable. Even though, at the very beginning of the power-on phase, the device
is maintained under reset by the internal low voltage detector circuit (implemented inside the
main voltage regulator) till the internal V
guaranty that the device stays under reset status if RSTIN is at high level during power ramp
up. So, it is important the external hardware is able to guarantee a stable ground level on
RSTIN along the power-on phase, without any temporary glitch.
The external hardware is responsible for driving the RSTIN pin low until the V
even though the internal LVD is active.
Once the internal reset signal goes low, the RAM (still frozen) power supply is switched to
the main V
At this time, everything becomes stable, and the execution of the initialization routines can
start: XRAM2EN bit can be set, enabling the RAM.
Real-time clock and stand-by mode
When stand-by mode is entered (turning off the main supply V
counting can be maintained running in case the on-chip 32 kHz oscillator is used to provide
the reference to the counter. This is not possible if the main oscillator is used as reference
for the counter: Being the main oscillator powered by V
oscillator is stopped.
Warning:
18SB
18
.
internal reference (derived from V
During power-off phase, it is important that the external
hardware maintains a stable ground level on RSTIN pin,
without any glitch, in order to avoid spurious exiting from
reset status with unstable power supply.
18
becomes higher than about 1.0 V, there is no
STBY
pin external voltage).
DD
, once this is switched off, the
DD
), the real-time clock
Power reduction modes
DD
is stable,
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DD