FM6124 Ramtron Corporation, FM6124 Datasheet - Page 10

• Manufacturer Part Number: FM6124
• Description: Event Data Recorder With F-ram
• Manufacturer: Ramtron Corporation

Battery-backed =
Note: When the device is first powered up and programmed, all timekeeping registers must be written because the battery-backed
register values cannot be guaranteed. The table below shows the default values of the nonvolatile registers and some of the
battery-backed bits. All other register values should be treated as unknown
Default Register Values
Rev. 4.0 (EOL)
July 2010
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
Address
1Eh-1Fh
33h
32h
31h
30h
2Fh
2Eh
2Dh
2Ch
2Bh
2Ah
29h
28h
27h
26h
25h
24h
23h
22h
21h
20h
~OSCEN
EWDF
Hex Value
undefined
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
LWDF
AF
10 minutes
10 seconds
10 month
10 hours
10 year
10 date
Nonvolatile =
CALS
POR
CF
CAL4
AEN
LB
Address
Day of week
1Dh
1Ch
1Bh
1Ah
19h
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
0Eh
0Dh
0Ch
0Bh
01h
00h
reserved
BB/NV User Programmable =
CAL3
-
Hex Value
0x81
0x81
0x80
0x80
0x80
0x40
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x01
0x00
0x00
0x00
0x80
CAL2
CAL
-
Minutes
Seconds
Month
Hours
Year
Date
.
CAL1
W
-
CAL0
R
Watchdog flags
BCD Year
BCD Month
BCD Date
BCD Day of Week
BCD Hours
BCD Minutes
BCD Seconds
CAL Control
RTC Control
Page 10 of 53
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W