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DS1678 Real-Time Event Recorder
11 of 25
Figure 2. DS1678 RTC and Control Page
MSB
LSB
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FUNCTION
00
0
10 Seconds
Seconds
01
0
10 Minutes
Minutes
AM/PM
02
0
12/
24
10 Hr
Hour
03
0
Day of Week
04
0
10 Date
Date
05
0
10 Mo
Month
06
10 Year
Year
07
10 Century
Century
RTC
08
MS
10 Seconds Alarm
Seconds Alarm
09
MM
10 Minutes Alarm
Minutes Alarm
AM/PM
0A
MH
12/
24
10 Hr
Hour Alarm
0B
MD
0
Day-of-Week Alarm
RTC Alarm
0C
0D
(Reads 00h)
Reserved
0E
ME
CLR
DIS1
DIS0
RO
TR1
TR0
EOSC
Control
0F
0
MEM
CLR
MIP
CM
LOBAT
ROF
0
ALMF
Status
10
11
12
↓
2F
Byte 1
Byte 2
Byte 3
↓
Byte 32
User-
Programmable
NV Memory
Higher addresses read back as 00h while a mission is in progress.
30
0
10 Seconds
Seconds
31
0
10 Minutes
Minutes
AM/PM
32
0
12/
24
10 Hr
Hours
33
0
Day-of-Week
34
0
10 Date
Date
35
0
10 Mo
Month
36
10 Year
Year
37
10 Century
Century
Time Stamp
38
Event 0 Elapsed Time from Last Event Counter LSB
39
Event 0 Elapsed Time from Last Event Counter MSB
Event 0 Rollover
Stamp
3A
Low Byte
3B
Medium Byte
3C
High Byte
Event Counter
3D
Low Byte
3E
High Byte
Elapsed Time
Counter (ETC)
3F
Low Address Byte
40
High Address Byte
Address Pointer
41
Low Address Byte
42
High Address Byte
43
Data Byte
Data Log RAM
Port
44
↓
FF
(Reads 00h)
Reserved
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