DS1337 Datasheet, PDF (13/13 Pages) Dallas Semiconductor – Serial Real-Time Clock

DS1337
START and STOP conditions are recognized as the beginning and end of a serial transfer (Figure 6).
The slave address byte is the first byte received after the master generates a START condition. The
slave address byte contains the 7-bit DS1337 address, which is 1101000, followed by the direction bit
(R/W), which, for a read, is 1. After receiving and decoding the slave address byte the device outputs
an acknowledge on the SDA line. The DS1337 then begins to transmit data starting with the register
address pointed to by the register pointer. If the register pointer is not written to before the initiation
of a read mode the first address that is read is the last one stored in the register pointer. The DS1337
must receive a “not acknowledge” to end a read.
Figure 5. Data Write: Slave Receiver Mode
Figure 6. Data Read: Slave Transmitter Mode
CHIP INFORMATION
Transistor Count: 10,950
Process: CMOS
PACKAGE INFORMATION
For the latest package outline information, go to www.maxim-ic.com/dallaspackinfo.
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