ZM7300G Series Digital Power Manager

Data Sheet

REV. 3.3 NOV 26, 2007

www.power-one.com

Page 9 of 32

10.1.1.1

Hardware Protection

The LCK_N pin enables the hardware memory write protection. If the pin is pulled low, the hardware lock is active

and the memory blocks are then read-only. I

write commands to the POL converters bypassing the DPM are also disabled. If the pin is left floating, the

hardware lock is disabled and the software write protection is active.

10.1.1.2

Software Protection

The software write protection allows users to protect the various memory blocks from being overwritten through

the I

The software write protection can be disabled by checking appropriate boxes in the Write Protections window

shown in Figure 5 or via the I

restored when the DPM’s input power is recycled.

Figure 5. GUI Write Protections Window

10.1.2 DPM Registers

The DPM setup registers occupy 70 bytes and contain all necessary information to set up the DPM functionality,

define POL converters and Auxiliary Devices, group membership and behavior, margining, interrupt

configurations, etc.

The DPM registers are listed in Table 1. The table relates to the DPM model number ZM7332 capable of

supporting up to 32 POL converters. For other DPM models some of the registers and/or bits in the registers are

not activated depending on the number of supported POLs/Groups/Interrupts/Parallel Buses for the specific DPM.

Writing into an unsupported register or bit will have no effect, reading from an unsupported register or bit will return

an error code (0x00).