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ISL1221 Arkusz danych(PDF) 2 Page - Intersil Corporation |
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ISL1221 Arkusz danych(HTML) 2 Page - Intersil Corporation |
2 / 24 page 2 FN6316.0 June 22, 2006 Block Diagram I2C INTERFACE CONTROL LOGIC ALARM FREQUENCY OUT RTC DIVIDER SDA BUFFER CRYSTAL OSCILLATOR POR SWITCH SCL BUFFER SDA SCL X1 X2 VDD VBAT IRQ/ EVDET INTERNAL SUPPLY VTRIP Seconds Minutes Hours Day of Week Date Month Year USER SRAM CONTROL REGISTERS EVIN GND FOUT Pin Descriptions PIN NUMBER SYMBOL DESCRIPTION 1X1 X1. The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal. X1 can also be driven directly from a 32.768kHz source. 2X2 X2. The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal. X2 should be left open when X1 is driven from external source. 3VBAT VBAT. This input provides a backup supply voltage to the device. VBAT supplies power to the device in the event that the VDD supply fails. This pin should be tied to ground if not used. 4GND Ground. 5EVIN Event Input (EVIN). The EVIN is an input pin that is used to detect an externally monitored event. When a high signal is present at the EVIN pin an “event” is detected. 6FOUT Frequency Output FOUT, Frequency output pin, 15 selectable frequencies. Open drain output. 7SDA Serial Data (SDA). SDA is a bidirectional pin used to transfer serial data into and out of the device. It has an open drain output and may be wire OR’ed with other open drain or open collector outputs. 8SCL Serial Clock (SCL). The SCL input is used to clock all serial data into and out of the device.Open drain output. 9IRQ/EVDET Interrupt (IRQ)/Event Detect (EVDET) Output. Multi-functional pin that can be used as interrupt for Alarm and Event Detect. Open Drain Output. 10 VDD VDD. Power supply. ISL1221 |
Podobny numer części - ISL1221 |
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Podobny opis - ISL1221 |
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