L9805 Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

Список матч

L9805

Super Smart Power Motor Driver with 8-BIT MCU, CAN Interface, 16K EPROM, 256Bytes RAM, 128 Bytes EEPROM, 10 Bit ADC, WDG, 2 Timers, 2 PWM Modules, Full H-Bridge Driver

STMicroelectronics 

L9805

3.4 MISCELLANEOUS REGISTER

(MISCR)

The Miscellaneous register allows the user to se-

lect the Slow operating mode and to set the clock

division prescaler factor. Bits 3, 4 determine the

signal conditions which will trigger an interrupt re-

quest on I/O pins having interrupt capability.

Register Address: 0020h — Read /Write

Reset Value:0000 0000 (00h)

b7 b6 b5 b4 b3 b2 b1 b0

b0 - Slow Mode Select

0- Normal mode - Oscillator frequency / 2

(Reset state)

1- Slow mode (Bits b1 and b2 define the prescaler

factor)

b1, b2 - CPU clock prescaler for Slow Mode

b2 b1 Option

0 0 Oscillator frequency / 4

1 0 Oscillator frequency / 8

0 1 Oscillator frequency / 16

1 1 Oscillator frequency / 32

b4 b3 Option

0 0 Falling edge and low level (Reset state)

1 0 Falling edge only

0 1 Rising edge only

1 1 Rising and Falling edge

The selection issued from b3/b4 combination is

applied to PA[0]..PA[7],PB0,PB1 external inter-

rupt. The selection can be made only if I bit in CC

register is reset (interrupt enabled).

b3, b4 can be written only when the Interrupt Mask

(I) of the CC (Condition Code) register is set to 1.

b5,b6,b7 = not used

19/103

Share Link: