Rainbow-electronics DS1338 Manual do Utilizador

1 of 15 REV: 091404 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisio

DS1338 I2C RTC with 56-Byte NV RAM 10 of 15 CLOCK AND CALENDAR The time and calendar information is obtained by reading the appropriate register byt

DS1338 I2C RTC with 56-Byte NV RAM 11 of 15 Control Register (07h) The control register controls the operation of the SQW/OUT pin and provides oscil

DS1338 I2C RTC with 56-Byte NV RAM 12 of 15 I2C SERIAL DATA BUS The DS1338 supports the I2C protocol. A device that sends data onto the bus is defin

DS1338 I2C RTC with 56-Byte NV RAM 13 of 15 Depending upon the state of the R/W bit, two types of data transfer are possible: 1) Data transfer fro

DS1338 I2C RTC with 56-Byte NV RAM 14 of 15 Figure 8. Data Write—Slave Receiver Mode Figure 9. Data Read—Slave Transmitter Mode

DS1338 I2C RTC with 56-Byte NV RAM 15 of 15 Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry en

DS1338 I2C RTC with 56-Byte NV RAM 2 of 15 ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground………………………………………………………..……..-0.3V to +6

DS1338 I2C RTC with 56-Byte NV RAM 3 of 15 DC ELECTRICAL CHARACTERISTICS (VCC = 0V, TA = -40°C to +85°C.) (Note 1) PARAMETER SYMBOL MIN TYP MAX UNI

DS1338 I2C RTC with 56-Byte NV RAM 4 of 15 POWER-UP/POWER-DOWN CHARACTERISTICS (TA = -40°C to +85°C) (Note 1, Figure 1) PARAMETER SYMBOL MIN TYP MA

DS1338 I2C RTC with 56-Byte NV RAM 5 of 15 Figure 2. Timing Diagram Figure 3. Block Diagram RAM (56 x 8) SERIAL BUS

DS1338 I2C RTC with 56-Byte NV RAM6 of 15 TYPICAL OPERATING CHARACTERISTICS(VCC = 3.3V, TA = +25°C, unless otherwise noted.)OSCILLATOR FREQUENCY vs.

DS1338 I2C RTC with 56-Byte NV RAM 7 of 15 PIN DESCRIPTION PIN 8 16 NAME FUNCTION 1 — X1 2 — X2 32.768kHz Crystal Connections. The internal oscill

DS1338 I2C RTC with 56-Byte NV RAM 8 of 15 OPERATION The DS1338 operates as a slave device on the serial bus. Access is obtained by implementing a S

DS1338 I2C RTC with 56-Byte NV RAM 9 of 15 CLOCK ACCURACY The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy o