W83977ATF Datasheet, PDF (179/207 Pages) Winbond – WINBOND I/O

9.3.12 Power Management 1 Timer 4 (PM1TMR4)
Register Location:
<CR60, 61> + BH System I/O Space
Default Value:
00h
Attribute:
Read only
Size:
8 bits
765
43
21
0
W83977ATF
PRELIMINARY
Bit
Name
0-7 Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Description
Reserved. These bits always return zeros.
9.3.13 General Purpose Event 0 Status Register 1 (GP0STS1)
Register Location:
<CR62, 63> System I/O Space
Default Value:
00h
Attribute:
Read/write
Size:
8 bits
765
43
21
0
URBSCISTS
URASCISTS
FDCSCISTS
PRTSCISTS
KBCSCISTS
MOUSCISTS
IRSCISTS
Reserved
These bits indicate the status of the SCI input, which is set when the device's IRQ is raised. If the
corresponding enable bit in the SCI interrupt enable register (in GP0EN1) is set, an SCI interrupt is
raised and routed to the output pin. Wrinting a 1 clears the bit, and writing a 0 has no effect. If the bit
is not cleared, new IRQ to the SCI logic input is ignored and no SCI interrupt will be raised.
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Publication Release Date:April 1998
Revision 0.53