Memory Maps and Registers

5.5.11 PLD Write Protect and I2C Debug Register

The MVME2500 PLD provides an 8-bit register which is used to indicate the status of I2C and SPI write-protect manual switches and is used to control the SPI write-enable. I2C debug ports are also provided in this register which can be used in controlling the bus’ status.

Table 5-14 PLD Write Protect and I2C Debug Register

REG

PLD Write Protect I2C Debug- 0xFFDF0054

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

7

6

5

4

3

2

1

0

 

 

 

 

 

 

 

 

 

Field

RSVD

MASTER

FLASH_

I2C_DEB

SERIAL_

RSVD

I2C_1_

I2C_1_C

 

 

_WP_DI

WP_N

UG_EN

FLASH_

 

D

 

 

 

SABLED

 

 

 

WP

 

 

 

 

 

 

 

 

 

 

 

 

OPER

R

R

R

R/W

R/W

R

R/W

R/W

 

 

 

 

 

 

 

 

 

RESET

0

1

0

0

1

0

1

1

 

 

 

 

 

 

 

 

 

 

Field Description

 

 

 

 

 

 

 

 

MASTER_WP_DISABLED

I2C devices manual switch write-protect status

 

 

 

 

1

- Write-protect enabled

 

 

 

 

 

 

0

- Write-protect disabled

 

 

 

FLASH_WP_N

 

SPI devices manual switch write-protect status

 

 

 

 

1

- Write-protect disabled

 

 

 

 

 

 

0

- Write-protect enabled

 

 

 

MVME2500 Installation and Use (6806800L01H)

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Emerson MVME2500 manual PLD Write Protect and I2C Debug Register, Rsvd Master Flash I2CDEB Serial