[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

4.3 Part Definitions

 
part
    id               = <id> ;                 # quoted string
    desc             = <description> ;        # quoted string
    has_jtag         = <yes/no> ;             # part has JTAG i/f
    has_debugwire    = <yes/no> ;             # part has debugWire i/f
    has_pdi          = <yes/no> ;             # part has PDI i/f
    has_tpi          = <yes/no> ;             # part has TPI i/f
    devicecode       = <num> ;                # numeric
    stk500_devcode   = <num> ;                # numeric
    avr910_devcode   = <num> ;                # numeric
    signature        = <num> <num> <num> ;    # signature bytes
    reset            = dedicated | io;
    retry_pulse      = reset | sck;
    pgm_enable       = <instruction format> ;
    chip_erase       = <instruction format> ;
    chip_erase_delay = <num> ;                # micro-seconds
    # STK500 parameters (parallel programming IO lines)
    pagel            = <num> ;                # pin name in hex, i.e., 0xD7
    bs2              = <num> ;                # pin name in hex, i.e., 0xA0
    serial           = <yes/no> ;             # can use serial downloading
    parallel         = <yes/no/pseudo>;       # can use par. programming
    # STK500v2 parameters, to be taken from Atmel's XML files
    timeout          = <num> ;
    stabdelay        = <num> ;
    cmdexedelay      = <num> ;
    synchloops       = <num> ;
    bytedelay        = <num> ;
    pollvalue        = <num> ;
    pollindex        = <num> ;
    predelay         = <num> ;
    postdelay        = <num> ;
    pollmethod       = <num> ;
    mode             = <num> ;
    delay            = <num> ;
    blocksize        = <num> ;
    readsize         = <num> ;
    hvspcmdexedelay  = <num> ;
    # STK500v2 HV programming parameters, from XML
    pp_controlstack  = <num>, <num>, ...;     # PP only
    hvsp_controlstack = <num>, <num>, ...;    # HVSP only
    hventerstabdelay = <num>;
    progmodedelay    = <num>;                 # PP only
    latchcycles      = <num>;
    togglevtg        = <num>;
    poweroffdelay    = <num>;
    resetdelayms     = <num>;
    resetdelayus     = <num>;
    hvleavestabdelay = <num>;
    resetdelay       = <num>;
    synchcycles      = <num>;                 # HVSP only
    chiperasepulsewidth = <num>;              # PP only
    chiperasepolltimeout = <num>;
    chiperasetime    = <num>;                 # HVSP only
    programfusepulsewidth = <num>;            # PP only
    programfusepolltimeout = <num>;
    programlockpulsewidth = <num>;            # PP only
    programlockpolltimeout = <num>;
    # JTAG ICE mkII parameters, also from XML files
    allowfullpagebitstream = <yes/no> ;
    enablepageprogramming = <yes/no> ;
    idr              = <num> ;                # IO addr of IDR (OCD) reg.
    rampz            = <num> ;                # IO addr of RAMPZ reg.
    spmcr            = <num> ;                # mem addr of SPMC[S]R reg.
    eecr             = <num> ;                # mem addr of EECR reg.
                                              # (only when != 0x3c)
    is_at90s1200     = <yes/no> ;             # AT90S1200 part
    is_avr32         = <yes/no> ;             # AVR32 part

    memory <memtype>
        paged           = <yes/no> ;          # yes / no
        size            = <num> ;             # bytes
        page_size       = <num> ;             # bytes
        num_pages       = <num> ;             # numeric
        min_write_delay = <num> ;             # micro-seconds
        max_write_delay = <num> ;             # micro-seconds
        readback_p1     = <num> ;             # byte value
        readback_p2     = <num> ;             # byte value
        pwroff_after_write = <yes/no> ;       # yes / no
        read            = <instruction format> ;
        write           = <instruction format> ;
        read_lo         = <instruction format> ;
        read_hi         = <instruction format> ;
        write_lo        = <instruction format> ;
        write_hi        = <instruction format> ;
        loadpage_lo     = <instruction format> ;
        loadpage_hi     = <instruction format> ;
        writepage       = <instruction format> ;
      ;
  ;

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

4.3.1 Parent Part

Parts can also inherit parameters from previously defined parts using the following syntax. In this case specified integer and string values override parameter values from the parent part. New memory definitions are added to the definitions inherited from the parent.

 
   part parent <id>                              # quoted string
       id               = <id> ;                 # quoted string
       <any set of other parameters from the list above>
     ;

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

4.3.2 Instruction Format

Instruction formats are specified as a comma separated list of string values containing information (bit specifiers) about each of the 32 bits of the instruction. Bit specifiers may be one of the following formats:

1

The bit is always set on input as well as output

0

the bit is always clear on input as well as output

x

the bit is ignored on input and output

a

the bit is an address bit, the bit-number matches this bit specifier’s position within the current instruction byte

aN

the bit is the Nth address bit, bit-number = N, i.e., a12 is address bit 12 on input, a0 is address bit 0.

i

the bit is an input data bit

o

the bit is an output data bit

Each instruction must be composed of 32 bit specifiers. The instruction specification closely follows the instruction data provided in Atmel’s data sheets for their parts. For example, the EEPROM read and write instruction for an AT90S2313 AVR part could be encoded as:

 
read  = "1  0  1  0   0  0  0  0   x x x x  x x x x",
        "x a6 a5 a4  a3 a2 a1 a0   o o o o  o o o o";

write = "1  1  0  0   0  0  0  0   x x x x  x x x x",
        "x a6 a5 a4  a3 a2 a1 a0   i i i i  i i i i";


[ < ] [ > ]   [ << ] [ Up ] [ >> ]

This document was generated by Joerg Wunsch on September 17, 2013 using texi2html 1.82.