Rainbow-electronics W90P710CDG Manual do Utilizador descarregar pdf (Página 71)

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101

W90P710CD/W90P710CDG

Publication Release Date: September 19, 2006

- 71 - Revision B2

Continued.

BITS DESCRIPTION

[2:1] WAITVT

Valid time of nWAIT signal

W90P710 recognizes the nWAIT signal at the next “nth” MCLK rising

edge after the nOE or nWBE active cycle. WAITVT bits determine the n.

WAITVT [2:1] nth MCLK

0 0 1

0 1 2

1 0 3

1 1 4

[0] LITTLE

Little Endian mode

After power on reset, the content of LITTLE is the Power-On Setting

value from D14 pin. If pin D14 is pull-down, the external memory format

is Big Endian mode. If pin D14 is pull-up, the external memory format is

Little Endian mode. For more detail, refer to Power-On Setting of System

Manager.

NOTE: This bit is read only.

ROM/Flash Control Register （ROMCON）

ROMCON

0xFFF0_1004

R/W ROM/FLASH control register

0x0000_0XFC

31 30 29 28 27 26 25 24

BASADDR

23 22 21 20 19 18 17 16

BASADDR SIZE

15 14 13 12 11 10 9 8

RESERVED tPA

7 6 5 4 3 2 1 0

tACC BTSIZE PGMODE

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 551 552

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