Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 44)

100

101

W90P710CD/W90P710CDG

- 44 -

Table 6.2.11 and Table 6.2.12

Using little-endian and half-word access, Program/Data path between register and external memory.

HA = Address whose LSB is 0,2,4,6,8,A,C,E HAL = Address whose LSB is 0,4,8,C

HAU = Address whose LSB is 2,6,A,E X = Don’t care

nWBE [3-0] / SDQM [3-0] = A means active and U means inactive

Table6.2.11 Half-word access write operation with little Endian

Access Operation Write Operation (CPU Register Î External Memory)

XD Width Word Half Word Byte

Bit Number

CPU Reg Data

31 0

ABCD

31 0

ABCD

31 0

ABCD

HAL HAU HA HA

Bit Number

31 0

CD CD

31 0

CD CD

31 0

CD CD

31 0

CD CD

31 0

CD CD

Bit Number

31 0

CD CD

31 0

CD CD

31 0

CD CD

7 0

HAL HAL HA HA HA+1

nWBE [3-0] /

SDQM [3-0]

UUAA AAUU XXAA XXXA XXXA

Bit Number

31 0

CD CD

31 0

CD CD

15 0

7 0

Bit Number

Ext. Mem Data

15 0

31 16

15 0

7 0

Timing Sequence 1st write 2nd write

Table6.2.12 Half-word access read operation with Little Endian

Access Operation Read Operation (CPU Register Í External Memory)

XD Width Word Half Word Byte

Bit Number

CPU Reg Data

15 0

HAL HAU HA HA

Bit Number

15 0

Bit Number

15 0

HAL HAL HA HA HA+1

SDQM [3-0]

UUAA AAUU XXAA XXXA XXXA

Bit Number

31 0

AB CD

31 0

AB CD

15 0

7 0

Bit Number

Ext. Mem Data

31 0

ABCD

15 0

7 0

Timing Sequence 1st read 2nd read

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 551 552

Rainbow-electronics W90P710CDG Manual de usuario Pagina 44

Comentarios a estos manuales

Rainbow-electronics W90P710CDG Manual de usuario Pagina 44

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics W90P710CDG