W83C553FY-G Nuvoton Technology Corporation of America, W83C553FY-G Datasheet - Page 102
W83C553FY-G
Manufacturer Part Number
W83C553FY-G
Description
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83C553FY-G.pdf
(149 pages)
Specifications of W83C553FY-G
Lead Free Status / RoHS Status
Compliant
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W83C553F
RTC CMOS RAM Protect 1 Register
Type:
Bit Description:
RTC CMOS RAM Protect 2 Register
Type:
Bit Description:
WINBOND SYSTEMS LABORATORY
Bits [7:0]:
Bits [7:0]:
Write only
Any value. Writing any value to this port sets a flip-flop which prevents any subsequent access
to addresses 20h - 2Fh of the Real Time Clock address space. This flip-flop is cleared only on
power-on reset. A read has no effect. This register's initial state after reset is in unprotected
mode. This register only exists in PowerPC mode.
Write only
Any value. Writing any value to this port sets a flip-flop which prevents any subsequent access
to addresses 30h - 3Fh of the Real Time Clock address space. This flip-flop is cleared only on
power-on reset. A read has no effect. This register's initial state after reset is in unprotected
mode. This register only exists in PowerPC mode.
Electrical Specifications
109
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