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SSR-25VA

ANV
Part Number SSR-25VA
Manufacturer ANV
Description SSR Series SOLID STATE RELAY
Published Apr 22, 2014
Detailed Description AN1355 A Complete Electronic Watch Based on MCP79410 I2C™ RTCC Author: Alexandru Valeanu Microchip Technology Inc. • On-...
Datasheet PDF File SSR-25VA PDF File

SSR-25VA
SSR-25VA

Overview
AN1355 A Complete Electronic Watch Based on MCP79410 I2C™ RTCC Author: Alexandru Valeanu Microchip Technology Inc.
• On-chip Digital Trimming/Calibration of the Oscillator • Operates down to 1.
3V VBAT Minimum • Operating Temperature Range: - Industrial (I): -40C to +85C • Multi-function Pin: - Open-drain configuration - Programmable clock frequency out - Programmable alarm output • Interrupt Capability (based on the 2 sets of Alarm Registers, ALM0 and ALM1) • Time-stamp Registers for holding the Time/Date of Crossing: - from VDD to VBAT - from VBAT to VDD INTRODUCTION An increasing number of applications that involve time measurement are requiring a Real-Time Clock/ Calendar (RTCC) device.
The MCP79410 is a feature-rich RTCC that incorporates EEPROM, SRAM, unique ID and time-stamp.
FEATURES OF THE RTCC STRUCTURE • I2C™ Bus Interface • RTCC with Time/Date Registers: Year, Month, Date, Day of Week, Hours, Minutes, Seconds • Support for Leap Year • Low-power CMOS Technology • Input for External Battery Backup (maintains SRAM, RTCC and Timekeeping) • On-board 32,768 kHz Crystal Oscillator for the RTCC SCHEMATIC The schematic includes a PIC18 Explorer demo board and the I2C RTCC PICtail™ daughter board as shown in Figure 1.
FIGURE 1: SCHEMATIC DB7 - 0 LCD LUMEX RS E SCK MCP23S17 SPI Expander CS SDI VDD RC5/SD01 C4 = 0.
1 uF RA2 10K S1 RB0 VDD VDD 2K RA4/T0 CKI C3 32.
768 kHz 1 X1 10pF Y VDD 8 2K PIC18F87J11 VDD 10K 2 C4 R4 X2 RTCC MCP 79410 MENU KEY MFP 7 S2 SCL 6 RC3/SCK1/SCL1 RA5 3 BAT 85 1K 100pF BAT VBAT 4 VSS SDA 5 2K VDD RC4/SDA1 INCR KEY  2010 Microchip Technology Inc.
DS01355A-page 1 Free Datasheet http://www.
Datasheet4U.
com AN1355 The resources used on the demo board are: • LCD • 2 push buttons • AC164140 RTCC PICtail daughter board To access the LCD through a minimum of pins, the SPI on the MSSP1 module is used, in conjunction with a 16-bit I/O expander with SPI interface (MCP23S17).
The two on-board push buttons are S1 and S2, ...


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