STSAFE-A110 datasheet(25/36 Pages) STMICROELECTRONICS

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DS13039 Rev 1

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STSAFE-A110

Electrical characteristics

Figure 13. Filtering capacitors on VCC

5.2.1

Power supply specifications

Table 3 provides the detailed description of the power requirements of STSAFE-A110.

5.2.2

Power-on and power-off sequences, and power supply glitch tolerance

The power-on sequence on STSAFE-A110 products need to follow the requirements

mentioned below:

•

The RESET pin must not be tight to High prior to the VCC power pin.

•

The RESET pin must be tied low prior to or simultaneously with the VCC pin.

•

The voltage applied to the VCC pin must be less than or equal to 0.3 V prior to starting a

new power-on sequence.

For security purposes, the STSAFE-A110 embeds detectors. When these are trigged, the

STSAFE-A100 device enters the Reset state until a power cycle or a reset event occurs.

Table 3. Power supply specifications

Name

Description

Conditions

Min.

Typ.

Max.

Units

VPOR

Power on reset voltage

1.35

1.45

1.55

VCC

Supply voltage

VCC to GND

1.62

5.5

VCC-HIPS

High power supply

detection

-5.6

6.3

6.9

ICC-PROC

Supply current while

processing a command

-14

ICC-STDBY

Supply current in standby

IO pulled up to VCC,

TA = 25 °C, 3 V to

5 V

160

245

460

µA

ICC-RESET

Supply current during

reset

RESET = 0

200

450

800

µA

ICC-HIBERNATE

Supply current during

hibernate

RESET = 1 (1)

TA = 25 °C

1. RESET must be tied to VCC ± 200mV in case of Wake-up from Hibernate on Reset event selected.

RESET, SDA and SCL must be tied to VCC ± 200mV in case of Wake-up from Hibernate on Reset event or

I²C start condition selected.

0.2

1.1

µA

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