w83c553f Winbond Electronics Corp America, w83c553f Datasheet - Page 112

• Manufacturer Part Number: w83c553f
• Description: System I/o Controller With Pci Arbiter
• Manufacturer: Winbond Electronics Corp America

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