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参数资料
| 型号： | RX-8581NB |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO22 |
| 封装： | SON-22 |
| 文件页数： | 20/32页 |
| 文件大小： | 399K |
| 代理商： | RX-8581NB |
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RX - 8581 SA / JE / NB
Page - 24
ETM13E-02
8.6.6. I
2C bus protocol
In the following sequence descriptions, it is assumed that the CPU is the master and the RX-8581 is the slave.
a. Address specification write sequence
Since the RX-8581 includes an address auto increment function, once the initial address has been specified,
the RX-8581 increments (by one byte) the receive address each time data is transferred.
(1) CPU transfers start condition [S].
(2) CPU transmits the RX-8581's slave address with the R/W bit set to write mode.
(3) Check for ACK signal from RX-8581.
(4) CPU transmits write address to RX-8581.
(5) Check for ACK signal from RX-8581.
(6) CPU transfers write data to the address specified at (4) above.
(7) Check for ACK signal from RX-8581.
(8) Repeat (6) and (7) if necessary. Addresses are automatically incremented.
(9) CPU transfers stop condition [P].
S
(1)
0
R/W
0
(3)
Address
(4)
0
(5)
0
Data
(8)
P
(9)
ACK signal from RX-8581
Data
(6)
0
(7)
(2)
Slave address
b. Address specification read sequence
After using write mode to write the address to be read, set read mode to read the actual data.
(1) CPU transfers start condition [S].
(2) CPU transmits the RX-8581's slave address with the R/W bit set to write mode.
(3) Check for ACK signal from RX-8581.
(4) CPU transfers address for reading from 8581.
(5) Check for ACK signal from RX-8581.
(6) CPU transfers RESTART condition [Sr] (in which case, CPU does not transfer a STOP condition [P]).
(7) CPU transfers RX-8581's slave address with the R/W bit set to read mode.
(8) Check for ACK signal from RX-8581 (from this point on, the CPU is the receiver and the RX-8581 is
the transmitter).
(9) Data from address specified at (4) above is output by the RX-8581.
(10) CPU transfers ACK signal to RX-8581.
(11) Repeat (9) and (10) if necessary. Read addresses are automatically incremented.
(12) CPU transfers ACK signal for "1".
(13) CPU transfers stop condition [P].
S
(1)
0
R/W
0
(3)
Address
(4)
Sr
(6)
0
(5)
1
R/W
0
(8)
Data
(9)
0
(10)
Data
(11)
P
(13)
1
(12)
ACK from RX-8581
ACK from CPU
(7)
Slave address
(2)
Slave address
c. Read sequence when address is not specified
Once read mode has been initially set, data can be read immediately. In such cases, the address for each read
operation is the previously accessed address + 1.
(1) CPU transfers start condition [S].
(2) CPU transmits the RX-8581's slave address with the R/W bit set to read mode.
(3) Check for ACK signal from RX-8581 (from this point on, the CPU is the receiver and the RX-8581 is the
transmitter).
(4) Data is output from the RX-8581 to the address following the end of the previously accessed address.
(5) CPU transfers ACK signal to RX-8581.
(6) Repeat (4) and (5) if necessary. Read addresses are automatically incremented in the RX-8581.
(7) CPU transfers ACK signal for "1".
(8) CPU transfers stop condition [P].
S
(1)
1
R/W
0
(3)
Data
(4)
0
(5)
1
(7)
Data
(6)
P
(8)
ACK from CPU
ACK from RX-8581
(2)
Slave address
相关PDF资料 |
PDF描述 |
|---|---|
| RX-8581NBB | REAL TIME CLOCK, PDSO20 |
| S-3510ACFJA-TB | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| S-3510ADFJ | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| S-3510AEFJ | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| S-3511AECAG | REAL TIME CLOCK, UUC8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RX-8581SA | 制造商:Epson Toyocom Corporation 功能描述:32.768kHz 0.45uA@3V(Typ.) 1.8 to 5.5V 10.1~5.0~3.2mm +85 -40 5}23ppm@+25/3.0V I2C-BusVAC^[tFCX 10.1mm 5mm 3.2mm 制造商:Epson Toyocom 功能描述:RTC module,I2C Bus,High quality,SOP14 |
| RX-8581SA B3 | 制造商:Epson Electronics America Inc 功能描述:Real Time Clock Serial 14-Pin SOP T/R 制造商:Epson 功能描述:Real Time Clock Serial 14-Pin SOP T/R |
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