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参数资料
型号： FM3316-G
元件分类： 消费家电
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO14
封装： GREEN, MO-012AB, SOIC-14
文件页数： 4/28页
文件大小： 320K
代理商： FM3316-G
FM33256/FM3316 SPI Companion w/ FRAM
Rev. 2.0
Feb. 2009
Page 12 of 28
Register Map
The RTC and processor companion functions are accessed via 30 special function registers, which are mapped to
unique op-codes. The interface protocol is described on page 17. The registers contain timekeeping data, alarm
settings, control bits, and information flags. A description of each register follows the summary table.
Register Map Summary Table
Battery-backed =
Nonvolatile =
BB/NV User Programmable =
Address
D7
D6
D5
D4
D3
D2
D1
D0
Function
Range
/Match
0
10 mo
Alarm months
Alarm Month
01-12
/Match
0
10 date
Alarm date
Alarm Date
01-31
/Match
0
Alarm 10 hours
Alarm hours
Alarm Hours
00-23
/Match
Alarm 10 minutes
Alarm minutes
Alarm Minutes
00-59
/Match
Alarm 10 seconds
Alarm seconds
Alarm Seconds
00-59
SNL
AL/SW
F1
F0
VBC
FC
VTP1
VTP0
Companion Control
Serial Number 7
FFh
Serial Number 6
FFh
Serial Number 5
FFh
Serial Number 4
FFh
Serial Number 3
FFh
Serial Number 2
FFh
Serial Number 1
FFh
Serial Number 0
FFh
Event Counter Byte 1
Event Counter 1
FFh
Event Counter Byte 0
Event Counter 0
FFh
NVC
-
RC
WC
POLL
CP
Event Counter Control
0Ch
WDE
-
WDSET4
WDET3
WDET2
WDET1
WDET0
Watchdog Control
0Bh
-
WDST4
WDST3
WDST2
WDST1
WDST0
Watchdog Control
0Ah
----
WR3
WR2
WR1
WR0
Watchdog Restart
09h
EWDF
LWDF
POR
LB
----
Watchdog Flags
08h
10 years
years
Years
00-99
07h
000
10 mo
months
Month
01-12
06h
00
10 date
date
Date
01-31
05h
0000
0
Day
01-07
04h
00
10 hours
hours
Hours
00-23
03h
0
10 minutes
minutes
Minutes
00-59
02h
0
10 seconds
seconds
Seconds
00-59
01h
-
CALS
CAL4
CAL3
CAL2
CAL1
CAL0
CAL/Control
00h
/OSCEN
AF
CF
AEN
reserved
CAL
W
R
RTC/Alarm Control
0Eh
Serial Number Byte 1
Serial Number Byte 0
1Ah
19h
10h
1Dh
1Ch
1Bh
day
Serial Number Byte 7
Serial Number Byte 6
Serial Number Byte 5
Serial Number Byte 4
Serial Number Byte 3
Serial Number Byte 2
0Dh
0Fh
18h
16h
17h
11h
13h
14h
15h
12h
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 non-volatile registers and some of
the battery-backed bits. All other register values should be treated as unknown
.
Default Register Values
Address
Hex Value
Address
Hex Value
1Dh
0x81
12h
0x00
1Ch
0x81
11h
0x00
1Bh
0x80
10h
0x00
1Ah
0x80
0Fh
0x00
19h
0x80
0Eh
0x00
18h
0x40
0Dh
0x01
17h
0x00
0Ch
0x00
16h
0x00
0Bh
0x00
15h
0x00
01h
0x00
14h
0x00
00h
0x80
13h
0x00
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