M41T83SQA6F STMicroelectronics, M41T83SQA6F Datasheet - Page 36

• Manufacturer Part Number: M41T83SQA6F
• Description: IC RTC SERIAL W/BATT SW 16QFN
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T83SQA6F

• Memory Size: 32B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Clock Format: 12Hr / 24Hr
• Clock Ic Type: RTC
• Interface Type: I2C, Serial
• Supply Voltage Range: 3V To 5.5V
• Digital Ic Case Style: QFN
• No. Of Pins: 16
• Rohs Compliant: Yes
• For Use With: 497-10833 - DAUGHTER-CARD M41T83SQA6E QFN16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6887-2; M41T83SQA6F

Clock operation
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Table 10.
1. Bit positions labeled with 0 should always be written with logic 0.
2. Writing to the timer register will not reset the TF bit nor clear the interrupt.
When the timer is in the free-running mode, with a value of n programmed into the timer
countdown value, the output will nominally be low for one cycle of the specified clock source
and high for n-1 cycles with an overal period of n cycles. Thus, the countdown period is
n/source clock frequency.
For the special case of n = 1, as shown in
the low time (T
Table 11.
1. IRQ1/FT/OUT is asserted coincident with TF going true.
2. n = loaded countdown timer value (0 < n < 255). The timer is stopped when n = 0.
Figure 21. Timer output waveform in free-running mode (with TI/TP = 1)
Source clock (Hz)
Addr
0Fh
10h
11h
4096
1/60
64
1
IRQ1/FT/OUT
WDF
TE
D7
Timer control register map
Timer interrupt operation in free-running mode (with TI/TP = 1)
L
) is half the clock period instead of a full clock period.
TI/TP
AF1
D6
1/8192 = 122 µs 1/4096 = 244 µs
1/128 = 7.8 ms
IRQ low time – T
n = 1
1/64
1/64
AF2
TIE
D5
(2)
Timer countdown value
Doc ID 12578 Rev 12
T
L
D4
BL
0
L
1/64 = 15.6 ms
(seconds)
(1)
Table
n > 1
1/64
1/64
D3
TF
0
T
IRQ
11, when the clock source is 4096 or 64 Hz,
(1)
(2)
OF
D2
0
1/4096 = 244 µs
1/64 = 15.6 ms
1 minute
IRQ period – T
TD1
D1
n = 1
0
1
TD0
D0
0
IRQ
M41T82-M41T83
(seconds)
Timer control
Timer value
n minutes
n / 4096
Function
n / 64
n > 1
Flags
n
AM03012v1