ST7L15 datasheet(108/138 Pages) STMICROELECTRONICS

108 / 138 page

ST7L15, ST7L19

108/138

SUPPLY CURRENT CHARACTERISTICS (cont’d)

13.4.2 On-chip Peripherals

Notes:

1. Data based on a differential IDD measurement between reset configuration (timer stopped) and a timer running in PWM

mode at fCPU =8 MHz.

2. Data based on a differential IDD measurement between reset configuration and a permanent SPI master communica-

tion (data sent equal to 55h).

3. Data based on a differential IDD measurement between reset configuration and continuous A/D conversions.

13.5 CLOCK AND TIMING CHARACTERISTICS

Subject to general operating conditions for VDD, fOSC and TA.

13.5.1 General Timings

Notes:

1. Guaranteed by Design. Not tested in production.

2. Data based on typical application software.

3. Time measured between interrupt event and interrupt vector fetch. Dtc(INST) is the number of tCPU cycles needed to

finish the current instruction execution.

13.5.2 Auto Wake-Up from Halt Oscillator (AWU)1)

Notes:

1. Guaranteed by Design. Not tested in production.

Symbol

Parameter

Conditions

Typ

Unit

IDD(AT)

12-bit Auto-Reload Timer supply current1)

fCPU =4 MHz

VDD = 3.3V

150

µA

fCPU =8 MHz

VDD = 5V

1000

IDD(SPI)

SPI supply current2)

fCPU =4 MHz

VDD = 3.3V

fCPU =8 MHz

VDD = 5V

200

IDD(ADC)

ADC supply current when converting3)

fADC =4 MHz

VDD = 3.3V

250

VDD = 5V

1100

Symbol

Parameter1)

Conditions

Min

Typ2)

Max

Unit

tc(INST)

Instruction cycle time

fCPU =8 MHz

tCPU

250

375

1500

tv(IT)

Interrupt reaction time3)

tv(IT) = ∆tc(INST) + 10

tCPU

1.25

2.75

µs

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fAWU

AWU oscillator frequency

125

250

kHz

tRCSRT

AWU oscillator start-up time

µs

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