AT697F_14 datasheet(92/176 Pages) ATMEL

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AT697F

7703E–AERO–08/11

Table 30. Multiply/Divide Register - Y

Notes: – This TMR-protected register can be safely read after power-up without prior initializa-

tion. However, bits unaffected by the reset operation will have an undertermined

value.

– This register is read and written using the non-priviledged RDY and WRY instructions.

Table 31. Trap Base Register - TBR

Notes: – This TMR-protected register can be safely read after power-up without prior initializa-

tion. However, bits unaffected by the reset operation will have an undetermined

value.

– This register is read and written using the priviledged RDTBR and WRTBR instructions.

Table 32. Program Counter - PC

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876

543

210

r/w

xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

Bit Number

Mnemonic

Description

31..0

Y Register

Contains the most significant word of the double-precision product of an integer

multiplication, as a result of either an integer multiply instruction (SMUL, SMULcc,

UMUL, UMULcc), or of a routine that uses the integer multiply step instruction

(MULScc).

Also holds the most significant word of the double-precision dividend for an integer

divide instruction (SDIV, SDIVcc, UDIV, UDIVcc).

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876

543

210

tba

reserved

r/w

xxxx xxxx xxxx xxxx xxxx

xxxx xxxx

0000

Bit Number

Mnemonic

Description

31..12

tba

Trap Base Address

The most-significant 20 bits of the trap table address.

11..4

Trap Type

Written by the hardware when a trap occurs (except for an external reset request),

and retains its value until the next trap. It provides an offset into the trap table.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876

543

210

0x00000000

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