/*
   iotn12.h - internal register definitions for ATtiny12

   Copyright (C) 1999 Marek Michalkiewicz <marekm@linux.org.pl>

   Permission to use, copy, modify, and distribute this software and
   its documentation for any purpose and without fee is hereby granted,
   without any conditions or restrictions.  This software is provided
   "as is" without express or implied warranty.

   Based on preliminary Atmel datasheet Rev. 1006B-10/99.
   For use in assembler programs - not supported by avr-gcc.
 */

#ifndef __IOTN12
#define __IOTN12

/* I/O space addresses */

/* 0x00..0x07 reserved */

/* Analog Comparator Control and Status Register */
#define ACSR	0x08

/* 0x09..0x15 reserved */

/* Input Pins, Port B */
#define PINB	0x16

/* Data Direction Register, Port B */
#define DDRB	0x17

/* Data Register, Port B */
#define PORTB	0x18

/* 0x19..0x1B reserved */

/* EEPROM Control Register */
#define EECR	0x1C

/* EEPROM Data Register */
#define EEDR	0x1D

/* EEPROM Address Register */
#define EEARL	0x1E

/* 0x1F..0x20 reserved */

/* Watchdog Timer Control Register */
#define WDTCR	0x21

/* 0x22..0x30 reserved */

/* Oscillator Calibration Register */
#define OSCCAL	0x31

/* Timer/Counter0 (8-bit) */
#define TCNT0	0x32

/* Timer/Counter0 Control Register */
#define TCCR0	0x33

/* MCU general Status Register */
#define MCUSR	0x34

/* MCU general Control Register */
#define MCUCR	0x35

/* 0x36..0x37 reserved */

/* Timer/Counter Interrupt Flag Register */
#define TIFR	0x38

/* Timer/Counter Interrupt MaSK Register */
#define TIMSK	0x39

/* General Interrupt Flag Register */
#define GIFR	0x3A

/* General Interrupt MaSK register */
#define GIMSK	0x3B

/* 0x3C..0x3E reserved */

/* Status REGister */
#define SREG	0x3F

/* Interrupt vectors (byte addresses) */

#define RESET_vect		(0x00)
#define INT0_vect		(0x02)
#define PIN_vect		(0x04)
#define TIMER0_OVF_vect		(0x06)
#define EE_RDY_vect		(0x08)
#define ANA_COMP_vect		(0x0A)

/* Bit numbers */

/* GIMSK */
#define INT0	6
#define PCIE	5

/* GIFR */
#define INTF0	6
#define PCIF	5

/* TIMSK */
#define TOIE0	1

/* TIFR */
#define TOV0	1

/* MCUCR */
#define PUD	6
#define SE	5
#define SM	4
#define ISC01	1
#define ISC00	0

/* TCCR0 */
#define CS02	2
#define CS01	1
#define CS00	0

/* WDTCR */
#define WDTOE	4
#define WDE	3
#define WDP2	2
#define WDP1	1
#define WDP0	0

/* EECR */
#define EERIE	3
#define EEMWE	2
#define EEWE	1
#define EERE	0

/*
   PB5 = RESET#
   PB4 = XTAL2
   PB3 = XTAL1
   PB2 = T0 / SCK
   PB1 = INT0 / AIN1 / MISO
   PB0 = AIN0 / MOSI
 */

/* PORTB */
#define PB4	4
#define PB3	3
#define PB2	2
#define PB1	1
#define PB0	0

/* DDRB */
#define DDB5	5
#define DDB4	4
#define DDB3	3
#define DDB2	2
#define DDB1	1
#define DDB0	0

/* PINB */
#define PINB5	5
#define PINB4	4
#define PINB3	3
#define PINB2	2
#define PINB1	1
#define PINB0	0

/* ACSR */
#define ACD	7
#define AINBG	6
#define ACO	5
#define ACI	4
#define ACIE	3
#define ACIS1	1
#define ACIS0	0

#define ZL r30
#define ZH r31

/* Last memory addresses */
#define RAMEND		0x1F
#define XRAMEND		0x0
#define E2END		0x3F
#define FLASHEND	0x3FF

#endif  /* __IOTN12 */