L9805 datasheet(8/103 Pages) STMICROELECTRONICS

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L9805

1.4 PIN DESCRIPTION

AD2-AD4: Analog input to ADC.

PA0/OCMP2_1-PA1/OCMP1_1: I/Os or Output

compares on Timer 1. Alternate function software

selectable (by setting OC2E or OC1E in CR2 reg-

ister: bit 6 or 7 at 0031h). When used as an alter-

nate function, this pin is a push-pull output as re-

quested by Timer 1. Otherwise, this pin is a trig-

gered floating input or a push-pull output.

PA2/ICAP2_1-PA3/ICAP1_1: I/Os or Input cap-

tures on Timer 1. Before using this I/O as alternate

inputs, they must be configured by software in in-

put mode (DDR=0). In this case, these pins are a

triggered floating input. Otherwise (I/O function),

these pin are triggered floating inputs or push-pull

outputs.

PA4/EXTCLK_1: PA4 I/O or External Clock on

Timer 1. Before using this I/O as alternate input, it

must be configured by software in input mode

(DDR=0). In this case, this pin is a triggered float-

ing input. Otherwise (I/O function), this pin is a trig-

gered floating input or a push-pull output.

PA5/OCMP2_2-PA6/OCMP1_2: I/Os or Output

Compares on Timer 2. Alternate function software

selectable (by setting OC2E or OC1E in CR2 reg-

ister: bit 6 or 7 at 0041h). When used as alternate

functions, these pins are push-pull outputs as re-

quested by Timer 2. Otherwise, these pins are trig-

gered floating inputs or push-pull outputs.

PA7/ICAP2_2-PB0/ICAP1_2: I/Os or Input Cap-

tures on Timer 2. Before using these I/Os as alter-

nate inputs, they must be configured by software

in input mode (DDR=0). In this case, these pins

are triggered floating inputs. Otherwise (I/O func-

tion), these pins are triggered floating inputs or

push-pull outputs.

PB1/EXTCLK_2: PB1 I/O or External Clock on

Timer 2. Before using this I/O as alternate input, it

must be configured by software in input mode

(DDR=0). In this case, this pin is a triggered float-

ing input. Otherwise (I/O function), this pin is a trig-

gered floating input or a push-pull output.

VPP/TM: Input. This pin must be held low during

normal operating modes.

VDD: Output. 5V Power supply for digital circuits,

from internal voltage regulator.

OSCIN: Input Oscillator pin.

OSCOUT: Output Oscillator pin.

GND: Ground for digital circuits.

VBR: Power supply for Right half-bridge.

OUTR: Output of Left half-bridge.

PGND: Ground for power transistor.

OUTL: Output of Right half-bridge.

VBL: Power supply for Left half-bridge.

VB1: Power supply for voltage regulators.

VB2: Pre-regulated voltage for analog circuits.

CAN_L: Low side CAN bus output.

CAN_H: High side CAN bus input.

NRESET: Bidirectional. This active low signal forc-

es the initialization of the MCU. This event is the

top priority non maskable interrupt. It can be used

to reset external peripherals.

PWMI:

PWM input. Directly connected to Input

Capture 2 on Timer 2.

PWMO: PWM output. Connected to the output of

PWM2 module.

AGND: Ground for all analog circuitry (except

power bridge).

VCC: Output. 5V power supply for analog circuits,

from internal voltage regulator.

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