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GEN module registers
68
NS7520 Hardware Reference, Rev. D 03/2006
System Status register
Address: FFB0 0004
All bits in the System Status register, except EXT, WDOG, PLL, and SOFT, are loaded
during a hardware reset only. EXT, WDOG, PLL, and SOFT are loaded during any
reset. The GEN_ID value is not affected when an external jumper is changed, unless a
hardware reset is executed first.
Register bit assignment
Bits Access Mnemonic Reset Description
D31:24 R/O REV
‘h29
NS7520 revision ID
Provides hardware identification of the NS7520
and its revision.
Current NS7520 device and revision ID is:
REV field:
‘h29
D23 R/C EXT N/A Last reset caused by external reset
When set to 1, indicates that the RESET_ pin
triggered the last hardware reset condition. This
reset initializes internal parameters as described in
"NS7520 bootstrap initialization" on page 60.
EXT is set/reset during every reset condition.
Clear this bit by writing
‘hF in bits 23:20.
Table 25: System Status register bit definition
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
SOFTREV EXT PLL
GEN_ID
Reserved
WDOG
Reserved