Page History
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| Name | IC | ID | PS7 | MIO | Notes |
|---|---|---|---|---|---|
| SPI Flash | S25FL256SAGBHI20 | U14 | QSPI0 | MIO1..MIO6 | - |
MAC Address EEPROM
A Microchip 24AA025E48 EEPROM (U23) is used which contains a globally unique 48-bit node address, that is compatible with EUI-48(TM) and EUI-64(TM) specification. The device is organized as two blocks of 128 x 8-bit memory. One of the blocks stores the 48-bit node address and is write protected, the other block is available for application use. It is accessible through the I²C slave address 0x53.
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RTC - Real Time Clock
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An temperature compensated Intersil ISL12020M is used as Real Time Clock (U24). Battery voltage must be supplied to the clock from the base board via pin 'VBAT_IN' (J1-146). Battery backed registers can be accessed over I²C bus at slave address 0x6F. General purpose RAM of the RTC can be accessed at I²C slave address 0x57. RTC IC is supported by Linux so it can be used as hwclock device. The interrupt line 'RTC_INT' of the RTC is connected to System Controller CPLD on bank 3, pin 4.
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Overview
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