DS1338 I2C RTC with 56-Byte NV RAM 13 of 16 Depending upon the state of the R/W " />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� DS1338U-33+T&R
寤犲晢锛� Maxim Integrated Products
鏂囦欢闋佹暩(sh霉)锛� 5/16闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC RTC 56BYTE NV RAM 3.3V 8-USOP
鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 3,000
椤炲瀷锛� 鏅�(sh铆)閻�/鏃ユ
鐗归粸(di菐n)锛� 闁忓勾锛孨VSRAM锛屾柟娉㈣几鍑�
瀛樺劜瀹归噺锛� 56B
鏅�(sh铆)闁撴牸寮忥細 HH:MM:SS锛�12/24 灏忔檪(sh铆)锛�
鏁�(sh霉)鎿�(j霉)鏍煎紡锛� YY-MM-DD-dd
鎺ュ彛锛� I²C锛�2 绶氫覆鍙�
闆绘簮闆诲锛� 3 V ~ 5.5 V
闆诲 - 闆绘簮锛岄浕姹狅細 1.3 V ~ 3.7 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 8-TSSOP锛�8-MSOP锛�0.118"锛�3.00mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 8-uMAX
鍖呰锛� 甯跺嵎 (TR)
DS1338 I2C RTC with 56-Byte NV RAM
13 of 16
Depending upon the state of the R/W bit, two types of data transfer are possible:
1)
Data transfer from a master transmitter to a slave receiver. The master transmits the first byte (the slave
address). Next follows a number of data bytes. The slave returns an acknowledge bit after each received byte.
Data is transferred with the most significant bit (MSB) first.
2)
Data transfer from a slave transmitter to a master receiver. The master transmits the first byte (the slave
address). The slave then returns an acknowledge bit, which is followed by the slave transmitting a number of
data bytes. The master returns an acknowledge bit after all received bytes other than the last byte. At the end
of the last received byte, a 鈥渘ot acknowledge鈥� is returned. The master device generates all of the serial clock
pulses and the START and STOP conditions. A transfer is ended with a STOP condition or with a repeated
START condition. Since a repeated START condition is also the beginning of the next serial transfer, the bus is
not released. Data is transferred with the most significant bit (MSB) first.
The DS1338 can operate in the following two modes:
1)
Slave receiver mode (write mode): Serial data and clock are received through SDA and SCL. An
acknowledge bit is transmitted after each byte is received. START and STOP conditions are recognized as the
beginning and end of a serial transfer. Hardware performs address recognition after reception of the slave
address and direction bit (Figure 6). The slave address byte is the first byte received after the master
generates the START condition. The slave address byte contains the 7-bit DS1338 address鈥�1101000鈥�
followed by the direction bit (R/W), which, for a write, is 0. After receiving and decoding the slave address byte,
the slave outputs an acknowledge on the SDA line. After the DS1338 acknowledges the slave address and
write bit, the master transmits a register address to the DS1338. This sets the register pointer on the DS1338,
with DS1338 acknowledging the transfer. The master may then transmit zero or more bytes of data, with the
DS1338 acknowledging each byte received. The register pointer increments after each data byte is transferred.
The master generates a STOP condition to terminate the data write.
2)
Slave transmitter mode (read mode): The first byte is received and handled as in the slave receiver mode.
However, in this mode, the direction bit indicates that the transfer direction is reversed. The DS1338 transmits
serial data on SDA while the serial clock is input on SCL. START and STOP conditions are recognized as the
beginning and end of a serial transfer (Figure 7). The slave address byte is the first byte received after the
master generates the START condition. The slave address byte contains the 7-bit DS1338 address鈥�
1101000鈥攆ollowed by the direction bit (R/W), which, for a read, is 1. After receiving and decoding the slave
address byte, the slave outputs an acknowledge on the SDA line. The DS1338 then starts transmitting data
using the register address pointed to by the register pointer. If the register pointer is not set before the initiation
of a read mode, the first address that is read is the last one stored in the register pointer. The register pointer is
incremented after each byte is transferred. The DS1338 must receive a 鈥渘ot acknowledge鈥� to end a read.
鐩搁棞(gu膩n)PDF璩囨枡
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鐩搁棞(gu膩n)浠g悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉)
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DS1338Z-18 鍔熻兘鎻忚堪:瀵�(sh铆)鏅�(sh铆)鏅�(sh铆)閻� I2C Serial RTC w/56 Byte NV RAM RoHS:鍚� 鍒堕€犲晢:Microchip Technology 鍔熻兘:Clock, Calendar. Alarm RTC 绺界窔鎺ュ彛:I2C 鏃ユ湡鏍煎紡:DW:DM:M:Y 鏅�(sh铆)闁撴牸寮�:HH:MM:SS RTC 瀛樺劜瀹归噺:64 B 闆绘簮闆诲-鏈€澶�:5.5 V 闆绘簮闆诲-鏈€灏�:1.8 V 鏈€澶у伐浣滄韩搴�:+ 85 C 鏈€灏忓伐浣滄韩搴�: 瀹夎棰�(f膿ng)鏍�:Through Hole 灏佽 / 绠遍珨:PDIP-8 灏佽:Tube
DS1338Z-18+ 鍔熻兘鎻忚堪:瀵�(sh铆)鏅�(sh铆)鏅�(sh铆)閻� I2C Serial RTC w/56 Byte NV RAM RoHS:鍚� 鍒堕€犲晢:Microchip Technology 鍔熻兘:Clock, Calendar. Alarm RTC 绺界窔鎺ュ彛:I2C 鏃ユ湡鏍煎紡:DW:DM:M:Y 鏅�(sh铆)闁撴牸寮�:HH:MM:SS RTC 瀛樺劜瀹归噺:64 B 闆绘簮闆诲-鏈€澶�:5.5 V 闆绘簮闆诲-鏈€灏�:1.8 V 鏈€澶у伐浣滄韩搴�:+ 85 C 鏈€灏忓伐浣滄韩搴�: 瀹夎棰�(f膿ng)鏍�:Through Hole 灏佽 / 绠遍珨:PDIP-8 灏佽:Tube