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ELANSC520 Datasheet(PDF) 31 Page - Advanced Micro Devices

Part # ELANSC520
Description  Microcontroller
PDF  440 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

ELANSC520 Datasheet(HTML) 31 Page - Advanced Micro Devices

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Configuration Register Overview
Élan™SC520 Microcontroller Register Set Manual
1-11
other device that is connected to the PCI bus. Refer to the
PCI Local Bus Specification,
Revision 2.2, for details on PCI configuration.
Table 1-3 lists all of the PCI indexed registers in the ÉlanSC520 microcontroller.
1.4
RTC AND CMOS RAM INDEXED REGISTERS
Real-time clock and CMOS RAM indexed registers are accessed using I/O ports 0070h
(index) and 0071h (data). These registers provide PC/AT-compatible setup, control, and
status functions for the RTC, as well as user CMOS RAM locations.
Table 1-4 lists all of the RTC indexed registers in the ÉlanSC520 microcontroller.
Table 1-3
PCI Indexed Registers
Register Name
Mnemonic
I/O Address
PCI Index
Page Number
Device/Vendor ID
PCIDEVID
0CF8h/0CFCh
00h
page 6-18
Status/Command
PCISTACMD
0CF8h/0CFCh
04h
page 6-19
Class Code/Revision ID
PCICCREVID
0CF8h/0CFCh
08h
page 6-22
Header Type
PCIHEADTYPE
0CF8h/0CFCh
0Eh
page 6-23
Master Retry Time-Out
PCIMRETRYTO
0CF8h/0CFCh
41h
page 6-24
Table 1-4
Real-Time Clock Indexed Registers
Register Name
Mnemonic
I/O Address
RTC Index
Page Number
RTC Current Second
RTCCURSEC
70h/71h
00h
page 17-4
RTC Alarm Second
RTCALMSEC
70h/71h
01h
page 17-5
RTC Current Minute
RTCCURMIN
70h/71h
02h
page 17-6
RTC Alarm Minute
RTCALMMIN
70h/71h
03h
page 17-7
RTC Current Hour
RTCCURHR
70h/71h
04h
page 17-8
RTC Alarm Hour
RTCALMHR
70h/71h
05h
page 17-9
RTC Current Day of the Week
RTCCURDOW
70h/71h
06h
page 17-10
RTC Current Day of the Month
RTCCURDOM
70h/71h
07h
page 17-11
RTC Current Month
RTCCURMON
70h/71h
08h
page 17-12
RTC Current Year
RTCCURYR
70h/71h
09h
page 17-13
RTC Control A
RTCCTLA
70h/71h
0Ah
page 17-14
RTC Control B
RTCCTLB
70h/71h
0Bh
page 17-16
RTC Status C
RTCSTAC
70h/71h
0Ch
page 17-18
RTC Status D
RTCSTAD
70h/71h
0Dh
page 17-20
General-Purpose CMOS RAM
(114 bytes)
RTCCMOS
70h/71h
0E–7Fh
page 17-21



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