Datasheet Microchip MCP795W21T-I/ST — 数据表

MCP795W1X/MCP795W2X
Battery-Backed SPI Real-Time Clock/Calendar with Enhanced Features
Device Selection Table User Memory Part Number EEPROM
(Kbits) Protected
EEPROM MCP795W10 1 Blank MCP795W20 2 Blank MCP795W11 1 EUI-48в„ў MCP795W21 2 EUI-48в„ў MCP795W12 1 EUI-64в„ў MCP795W22 2 EUI-64в„ў 64-Byte Battery-Backed SRAM 1 Kbit or 2 Kbit EEPROM:
-Software write-protect
-Page write up to 8 bytes
-Endurance: 1M erase/write cycles 128-Bit Protected EEPROM Area:
-Robust write unlock sequence
-EUI-48в„ў MAC address (MCP795WX1)
-EUI-64в„ў MAC address (MCP795WX2) Timekeeping Features Real-Time Clock/Calendar (RTCC):
-Hours, minutes, seconds, hundredth of
seconds, day of week, date, month, year
-Leap year compensated to 2399
-12/24-hour modes Oscillator for 32.768 kHz Crystals:
-Optimized for 6-9 pF crystals On-Chip Digital Trimming/Calibration:
-В±1 ppm resolution
-В±259 ppm range Dual Programmable Alarms Clock Output Function with Selectable Frequency Power-Fail Timestamp:
-Time logged on switchover to and from Battery
mode Low-Power Features Wide Voltage Range:
-Operating voltage range of 1.8V to 3.6V
-Backup voltage range of 1.3V to 3.6V Low Typical Timekeeping Current:
-Operating from VCC: 1.2 ВµA at 3.0V …