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FM3135-GTR Folha de dados(PDF) 8 Page - Ramtron International Corporation

Nome de Peças FM3135-GTR
Descrição Electrónicos  Integrated RTC/Alarm/F-RAM & Embedded Crystal
Download  21 Pages
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Fabricante Electrônico  RAMTRON [Ramtron International Corporation]
Página de início  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM3135-GTR Folha de dados(HTML) 8 Page - Ramtron International Corporation

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FM3135 Integrated RTC/Alarm/FRAM & Embedded Crystal
Rev. 1.2
Feb. 2009
Page 8 of 21
Register Map
The RTC, alarm, and other functions are accessed via 15 special function registers mapped to a separate 2-wire
device ID. The interface protocol is described below. The registers contain timekeeping data, control bits, or
information flags. A description of each register follows the summary table below.
Register Map Summary Table
Address
D7
D6
D5
D4
D3
D2
D1
D0
Function
Range
0Eh
AL/SW
F1
F0
WP1
WP0
VBC
FC
TST
Alarm & WP Control
0Dh
/Match
0
0
10 mo
Alarm months
Alarm Month
01-12
0Ch
/Match
0
10 date
Alarm date
Alarm Date
01-31
0Bh
/Match
0
Alarm 10 hours
Alarm hours
Alarm Hours
00-23
0Ah
/Match
Alarm 10 minutes
Alarm minutes
Alarm Minutes
00-59
09h
/Match
Alarm 10 seconds
Alarm seconds
Alarm Seconds
00-59
08h
10 years
years
RTC Years
00-99
07h
00
0
10 mo
months
RTC Month
1-12
06h
00
10 date
date
RTC Date
1-31
05h
00
00
0
day
RTC Day
1-7
04h
00
10 hours
hours
RTC Hours
0-23
03h
0
10 minutes
minutes
RTC Minutes
0-59
02h
0
10 seconds
seconds
RTC Seconds
0-59
01h
/OSCEN
-
CALS
CAL4
CAL3
CAL2
CAL1
CAL0
CAL/Control
00h
LB
AF
CF
POR
AEN
CAL
W
R
RTC/Alarm Control
Note: When the device is first powered up, all registers should be treated as unknown and must be written.
Otherwise, unpredictable behavior may result.


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