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參數(shù)資料
| 型號： | M41T315Y |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Serial Access Phantom RTC Supervisor |
| 中文描述： | 串行訪問幻影時鐘監(jiān) |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 404K |
| 代理商： | M41T315Y |
13/24
M41T315Y*, M41T315V, M41T315W
CLOCK OPERATION
Clock Register Information
Clock information is contained in eight registers of
8 bits, each of which is sequentially accessed 1 bit
at a time after the 64-bit pattern recognition se-
quence has been completed. When updating the
clock registers, each must be handled in groups of
8 bits. Writing and reading individual bits within a
register could produce erroneous results. These
READ/WRITE registers are defined in
Table
5., page 13
.
Data contained in the clock registers is in binary
coded decimal format (BCD). Reading and writing
the registers is always accomplished by stepping
though all eight registers, starting with Bit 0 of
Register 0 and ending with Bit 7 of Register 7.
AM-PM/12/24 Mode
Bit 7 of the hours register is defined as the 12-hour
or 24-hour mode select bit. When high, the 12-
hour mode is selected. In the 12-hour mode, Bit 5
is the AM/PM bit with logic high being PM. In the
24-hour mode, Bit 5 is the second 10-hour bit (20-
23 hours).
Oscillator and Reset Bits
Bits 4 and 5 of the day register are used to control
the reset and oscillator functions. Bit 4 controls the
reset pin input. When the Reset Bit is set to logic
'1,' the reset input pin is ignored. When the Reset
Bit is set to logic '0,' a low input on the reset pin will
cause the device to abort data transfer without
changing data in the timekeeping registers. Reset
operates independently of all other inputs. Bit 5
controls the oscillator. When set to logic '0,' the os-
cillator turns on and the real time clock/calendar
begins to increment.
Zero Bits
Registers 1, 2, 3, 4, 5, and 6 contain one (1) or
more bits that will always read logic '0.' When writ-
ing to these locations, either a logic '1' or '0' is ac-
ceptable.
Table 5. RTC Register Map
Keys:
A/P = AM/PM Bit
12/24 = 12 or 24-hour mode Bit
OSC = Oscillator Bit
RST = Reset Bit
0 = Must be set to '0'
Figure 11. Reset Pulse Waveform
Function/Range
BCD Format
Register
D7
D6
D5
D4
D3
D2
D1
D0
0
0.1 Seconds
0.01 Seconds
Seconds
00-99
1
0
10 Seconds
Seconds
Seconds
00-59
2
0
10 Minutes
Minutes
Minutes
00-59
3
12/24
0
10 /
A/P
Hrs
Hours (24 Hour Format)
Hours
01-12/
00-23
4
0
0
OSC
RST
0
Day of the Week
Day
01-7
5
0
0
10 date
Date: Day of the Month
Date
01-31
6
0
0
0
10M
Month
Month
01-12
7
10 Years
Year
Year
00-99
tRST
RST
AI04260
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| M41T315Y-65MH6E | Serial Access Phantom RTC Supervisor |
| M41T315Y-65MH6F | Serial Access Phantom RTC Supervisor |
| M41T315Y-65MH6TR | Serial Access Phantom RTC Supervisor |
| M41T315Y-65MQ6E | Serial Access Phantom RTC Supervisor |
| M41T315Y-65MQ6F | Serial Access Phantom RTC Supervisor |
相關(guān)代理商/技術(shù)參數(shù) |
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| M41T315Y_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access phantom RTC supervisor |
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| M41T315Y-65MH6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access phantom RTC supervisor |
| M41T315Y-65MH6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Phantom RTC Supervisor |
| M41T315Y-65MQ6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access phantom RTC supervisor |
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