ZM7304G-65503Y-Q1 POWER-ONE [Power-One], ZM7304G-65503Y-Q1 Datasheet - Page 9

• Manufacturer Part Number: ZM7304G-65503Y-Q1
• Description: Digital Power Manager
• Manufacturer: POWER-ONE [Power-One]

10.1.1.1
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
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.
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).
REV. 3.3 NOV 26, 2007
2
C bus. At the power-up the WP register is defaulted to write protect.
Hardware Protection
Software Protection
2
C bus by writing directly into the register. The write protections are automatically
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Figure 5. GUI Write Protections Window
2
C write commands to the DPM return an error code (0x00). The
ZM7300G Series Digital Power Manager
Page 9 of 32
Data Sheet