Artesyn Embedded Technology ATCA-7370, Installation And Use Manual

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Maps and Registers
ATCA-7370/ATCA-7370-S Installation and Use (6806800P54G )
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A Divisor value of 0 in the Divisor Latch Register is not allowed.
6.3 FPGA Register Mapping
6.3.1 LPC I/O Register Map
The FPGA registers may be accessed via LPC I/O cycles in the I/O address range REGISTERS. See
Table 6-42 "FPGA Register Map Overview" . For an LPC register access, use the base address
0x600 and add the Address Offset. An LPC I/O write-access to an address not listed in this table
or marked with a "-" in the LPC I/O column is ignored. A corresponding read access delivers
always zero.
Note: LPC I/O Address = 0x600 + Address Offset
Table 6-40 Divisor Latch LSB Register (DLL), if DLAB=1
LPC IO Address: Base
Bit Description Default Access
7:0 Divisor Latch LSB (DLL) Undef. LPC: r/w
Table 6-41 Divisor Latch MSB Register (DLM), if DLAB=1
LPC IO Address: Base + 1
Bit Description Default Access
7:0 Divisor Latch MSB (DLM) Undef. LPC: r/w