SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 120

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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SuperI/O Module
4.5.3
The RTC registers can be accessed (see Section 4.4.2.1
"LDN 00h - Real-Time Clock" on page 107) at any time dur-
ing normal operation mode (i.e.,when V
ommended operation range). This access is disabled
during battery-backed operation. The write operation to
1.
Programmable
Programmable
Programmable
Overlaid on RAM bytes in range 0Eh-7Fh. See Section 4.4.2.1 "LDN 00h - Real-Time Clock" on page 107.
Index
0Ah
0Bh
0Ch
0Dh
RTC Registers
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
1
1
1
(Continued)
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
SB
SEC. Seconds Register
SECA. Seconds Alarm Register
MIN. Minutes Register
MINA. Minutes Alarm Register
HOR. Hours Register
HORA. Hours Alarm Register
DOW. Day Of Week Register
DOM. Date Of Month Register
MON. Month Register
YER. Year Register
CRA. RTC Control Register A
CRB. RTC Control Register B
CRC. RTC Control Register C
CRD. RTC Control Register D
DOMA. Date of Month Alarm Register
MONA. Month Alarm Register
CEN. Century Register
Name
is within the rec-
Table 4-19. RTC Register Map
120
these registers is also disabled if bit 7 of the CRD Register
is 0.
Note:
This section describes the RTC Timing and Control Regis-
ters that control basic RTC functionality.
Before attempting to perform any start-up proce-
dures, read about bit 7 (VRT) of the CRD Register.
Bit specific
Bit specific
Bit specific
V
V
V
V
V
V
V
V
V
V
V
V
V
V
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
Reset
Type
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
PUR
Revision 3.0