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參數(shù)資料
| 型號： | M41T94MQ6TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 5/40頁 |
| 文件大?。?/td> | 328K |
| 代理商： | M41T94MQ6TR |
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M41T94
Operation
3.1
SPI bus characteristics
The Serial Peripheral interface (SPI) bus is intended for synchronous communication between different
ICs. It consists of four signal lines: Serial data input (SDI), Serial data output (SDO), Serial clock (SCL)
and a Chip Enable (E).
By definition a device that gives out a message is called “transmitter,” the receiving device that gets the
message is called “receiver.” The device that controls the message is called “master.” The devices that
are controlled by the master are called “slaves.”
The E input is used to initiate and terminate a data transfer. The SCL input is used to synchronize data
transfer between the master (micro) and the slave (M41T94) devices.
The SCL input, which is generated by the microcontroller, is active only during address and data transfer
to any device on the SPI bus (see Figure 5 on page 9).
The M41T94 can be driven by a microcontroller with its SPI peripheral running in either of the two
following modes:
●
(CPOL, CPHA) = ('0', '0') or
●
(CPOL, CPHA) = ('1', '1').
For these two modes, input data (SDI) is latched in by the low-to-high transition of clock SCL, and output
data (SDO) is shifted out on the high-to-low transition of SCL (see Table2 on page10 and Figure 6 on
There is one clock for each bit transferred. Address and data bits are transferred in groups of eight bits.
Due to memory size the second most significant address bit is a Don’t Care (address bit 6).
Figure 7.
Input timing requirements
AI04633
SCL
SDI
E
MSB IN
SDO
tDVCH
HIGH IMPEDANCE
LSB IN
tELCH
tCHDX
tDLDH
tDHDL
tCHCL
tCLCH
tEHCH
tEHEL
tCHEH
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相關(guān)代理商/技術(shù)參數(shù) |
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| M41TC8025CMC7F | 制造商:STMicroelectronics 功能描述:HIGHLY ACCURATE, TEMPERATURE-COMPENSATEDSERIAL REAL-TIME CL - Tape and Reel |
| M41TM6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:512 bit 64b x8 Serial Access TIMEKEEPER SRAM |
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