Artesyn MVME2502 Installation and Use (April 2015) - Manual (Page 123)

Memory Maps and Registers
MVME2502 Installation and Use (6806800R96E) 123
5.5.12 PLD Write Protect and I2C Debug Register
The MVME2502 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. The I2C debug
ports are also provided in this register which is used in controlling the bus’ status.
Table 5-15 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
_WP_DI
SABLED FLASH_
WP_N I2C_DEB
UG_EN SERIAL_
FLASH_
WP RSVD I2C_1_
D I2C_1_C
OPER R R R R/W R/W R R/W R/W
RESET 0 1 0 0 1 0 1 1
Field Description
SPD_WP- SPD write-protection
0 - SPD Writes enabled
1 - SPD Writes disabled
MASTER_WP- MASTER WP Switch (S2-6)
0-Switch S2-6 closed. SPI, SPD, VPD, USER FLASH
write enable
1-Switch S2-6 open, register bits control write
protection
USER_WP- USER FLASH write-protect
1 - USER I2C FLASH writes disabled
0 - USER I2C FLASH writes enabled