M41T00AUD_12 STMICROELECTRONICS [STMicroelectronics], M41T00AUD_12 Datasheet - Page 19

• Manufacturer Part Number: M41T00AUD_12
• Description: Serial real-time clock (RTC) with audio
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M41T00AUD
Table 4.
1. Key:
2. 0 bits always read as 0. Writing them has no effect.
3. Y bits are indeterminate at power-up. These are the factory test mode bits, and must be written to 0.
Addr
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
S = SIGN bit
FT = Frequency test bit
ST = STOP bit
OF = Oscillator fail detect flag
OFIE = Oscillator fail interrupt enable
OUT = Logic output
TCHE3:TCHEO = Trickle charge enable bits
TCFE = Trickle charge FET bypass enable
HT = Halt bit
TCH2 = Trickle charge enable #2
TONE = Tone on/off select
CB = Century bit
CEB = Century enable bit
256/512 = Tone frequency select bit
256/512
OUT
CEB
0
D7
ST
HT
0
0
0
(2)
M41T00AUD register map
TONE
TCFE
Y
CB
D6
FT
10 years
0
0
(3)
10 seconds
10 minutes
TCH2
D5
OF
Y
S
0
10 hours
10 date
MUTE
OFIE
10M
D4
Y
(1)
<------------- Calibration ------------>
Bit
TCHE3
Doc ID 13480 Rev 5
D3
0
<--------------GAIN ------------>
Hours (24 hour format)
Date: day of month
TCHE2
D2
Seconds
Minutes
Month
Year
Day of week
TCHE1
D1
TCHE0
D0
M41T00AUD clock operation
Register name
Century/hours
Cal/control
Seconds
Control2
Minutes
Month
Audio
Date
Year
Day
0-1/00-23
Range
00-59
00-59
01-31
01-12
00-99
1-7
19/42