L9803 STMicroelectronics, L9803 Datasheet - Page 11

• Manufacturer Part Number: L9803
• Description: Super Smart Power Motor Driver With 8-bit Mcu, Ram, Eeprom, Adc, Wdg, Timers, Pwm And H-bridge Driver
• Manufacturer: STMicroelectronics

L9803
1.4
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 register: bit 6 or 7 at 0041h). When
used as alternate functions, these pins are push-pull outputs as requested by Timer 2.
Otherwise, these pins are triggered floating inputs or push-pull outputs.
PA7/ICAP2_2-PB0/ICAP1_2: I/Os or Input Captures on Timer 2. Before using these I/Os as
alternate inputs, they must be configured by software in input mode (DDR=0). In this case,
these pins are triggered floating inputs. Otherwise (I/O function), 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 floating input. Otherwise (I/O function), this pin is a triggered floating input or a
push-pull output.
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 forces 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.
Register & Memory Map
As shown in the
registers. In this MCU, 63742 of these bytes are user accessible.
The available memory locations consist of 128 bytes of I/O registers, 256 bytes of RAM, 128
bytes of EEPROM and 16Kbytes of user ROM. The RAM space includes 64bytes for the
stack from 0140h to 017Fh.
Table
1, the MCU is capable of addressing 64K bytes of memories and I/O
General description
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