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X1226S8I View Datasheet(PDF) - Xicor -> Intersil

Part Name
Description
Manufacturer
X1226S8I
Xicor
Xicor -> Intersil Xicor
X1226S8I Datasheet PDF : 24 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
X1226
Each register is read and written through buffers. The
non-volatile portion (or the counter portion of the RTC) is
updated only if RWEL is set and only after a valid write
operation and stop bit. A sequential read or page write
operation provides access to the contents of only one
section of the CCR per operation. Access to another sec-
tion requires a new operation. Continued reads or writes,
once reaching the end of a section, will wrap around to
the start of the section. A read or write can begin at any
address in the CCR.
It is not necessary to set the RWEL bit prior to writing
the status register. Section 5 (status register) supports
a single byte read or write only. Continued reads or
writes from this section terminates the operation.
The state of the CCR can be read by performing a ran-
dom read at any address in the CCR at any time. This
returns the contents of that register location. Addi-
tional registers are read by performing a sequential
read. The read instruction latches all Clock registers
into a buffer, so an update of the clock does not
change the time being read. A sequential read of the
CCR will not result in the output of data from the mem-
ory array. At the end of a read, the master supplies a
stop condition to end the operation and free the bus.
After a read of the CCR, the address remains at the
previous address +1 so the user can execute a current
address read of the CCR and continue reading the
next Register.
Table 1. Clock/Control Memory Map
Addr.
Type
Reg
Name
7
6
5
Bit
4
3
2
Range
1
0 (optional)
003F Status
SR BAT
AL1
AL0
0
0
RWEL
WEL
RTCF
01h
0037
RTC
Y2K
0
0036 (SRAM) DW
0
0
Y2K21 Y2K20 Y2K13
0
0
Y2K10 19/20 20h
0
0
0
0
DY2
DY1
DY0
0-6 00h
0035
YR Y23
Y22
Y21
Y20
Y13
Y12
Y11
Y10
0-99 00h
0034
MO
0
0
0
G20
G13
G12
G11
G10
1-12 00h
0033
DT
0
0
D21
D20
D13
D12
D11
D10
1-31 00h
0032
HR MIL
0
H21
H20
H13
H12
H11
H10
0-23 00h
0031
MN
0
M22
M21
M20
M13
M12
M11
M10
0-59 00h
0030
SC
0
S22
S21
S20
S13
S12
S11
S10
0-59 00h
0013 Control DTR
0
0
0
0
0
DTR2
DTR1
DTR0
00h
0012 (EEPROM) ATR
0
0
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
00h
0011
INT
IM
AL1E
AL0E
FO1
FO0
X
X
X
00h
0010
BL
BP2
BP1
BP0
0
0
0
0
0
00h
000F Alarm1 Y2K1
0
0
A1Y2K21 A1Y2K20 A1Y2K13
0
000E (EEPROM) DWA1 EDW1
0
0
0
0
DY2
0
A1Y2K10 19/20 20h
DY1
DY0
0-6 00h
000D
YRA1
Unused - Default = RTC Year value (No EEPROM) - Future expansion
000C
MOA1 EMO1
0
0
A1G20 A1G13 A1G12 A1G11 A1G10 1-12 00h
000B
DTA1 EDT1
0
A1D21 A1D20 A1D13 A1D12 A1D11 A1D10 1-31 00h
000A
HRA1 EHR1
0
A1H21 A1H20 A1H13 A1H12 A1H11 A1H10 0-23 00h
0009
MNA1 EMN1 A1M22 A1M21 A1M20 A1M13 A1M12 A1M11 A1M10 0-59 00h
0008
SCA1 ESC1 A1S22 A1S21 A1S20 A1S13 A1S12 A1S11 A1S10 0-59 00h
0007 Alarm0 Y2K0
0
0
A0Y2K21 A0Y2K20 A0Y2K13
0
0006 (EEPROM) DWA0 EDW0
0
0
0
0
DY2
0
A0Y2K10 19/20 20h
DY1
DY0
0-6 00h
0005
YRA0
Unused - Default = RTC Year value (No EEPROM) - Future expansion
0004
MOA0 EMO0
0
0
A0G20 A0G13 A0G12 A0G11 A0G10 1-12 00h
0003
DTA0 EDT0
0
A0D21 A0D20 A0D13 A0D12 A0D11 A0D10 1-31 00h
0002
HRA0 EHR0
0
A0H21 A0H20 A0H13 A0H12 A0H11 A0H10 0-23 00h
0001
MNA0 EMN0 A0M22 A0M21 A0M20 A0M13 A0M12 A0M11 A0M10 0-59 00h
0000
SCA0 ESC0 A0S22 A0S21 A0S20 A0S13 A0S12 A0S11 A0S10 0-59 00h
REV 1.1.24 1/13/03
www.xicor.com
Characteristics subject to change without notice. 4 of 24
 

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