MC68HC705F32CPU datasheet(13/198 Pages) FREESCALE

13 / 198 page

MC68HC05F32

MOTOROLA

TABLE OF CONTENTS

Paragraph

Number

Page

Number

TITLE

11.11.2

Serial communications control register 1 (SCCR1) ......................................... 11–9

11.11.3

Serial communications control register 2 (SCCR2) ....................................... 11–11

11.11.4

Serial communications status register (SCSR).............................................. 11–12

11.11.5

Baud rate register (BAUD) ............................................................................. 11–14

11.12 Baud rate selection .............................................................................................. 11–16

11.13 SCI during STOP mode ....................................................................................... 11–16

11.14 SCI during WAIT mode ........................................................................................ 11–16

PULSE WIDTH MODULATOR

12.1

PWM introduction .................................................................................................. 12–1

12.2

Functional description............................................................................................ 12–2

12.3

Registers ............................................................................................................... 12–2

12.3.1

PWM control (PWMCR) ................................................................................... 12–3

12.3.2

PWM data registers (PWMD)........................................................................... 12–4

12.4

PWM during WAIT mode ....................................................................................... 12–4

12.5

PWM during STOP mode ...................................................................................... 12–5

12.6

PWM during reset .................................................................................................. 12–5

32 KHZ CLOCK SYSTEM

13.1

32 kHz clock system .............................................................................................. 13–1

13.1.1

Custom periodic interrupt control/status register (CPICSR) ............................ 13–1

13.1.1.1

Refresh clock.............................................................................................. 13–2

13.2

Operation during STOP mode ............................................................................... 13–2

13.3

Operation during WAIT mode ................................................................................ 13–2

RESETS AND INTERRUPTS

14.1

Resets ................................................................................................................... 14–1

14.1.1

Power-on reset ................................................................................................. 14–1

14.1.2

RESET pin ....................................................................................................... 14–1

14.1.3

Illegal address reset......................................................................................... 14–1

14.1.4

Computer operating properly (COP) reset ....................................................... 14–2

14.1.5

Low voltage reset ............................................................................................. 14–2

14.2

Interrupts ............................................................................................................... 14–3

14.2.1

Interrupt priorities ............................................................................................. 14–4

14.2.2

Non-maskable software interrupt (SWI) ........................................................... 14–4

14.2.3

Maskable hardware interrupts.......................................................................... 14–4

14.2.3.1

Real time and core timer (CTIMER) interrupts ........................................... 14–4

14.2.3.2

Programmable 16-bit timer interrupt........................................................... 14–6

05F32Book Page v Tuesday, June 8, 1999 7:55 am

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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