TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 33 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
3.2
I2C Bus 1 Peripherals
The CN78XX TWSI1 interface is the I2C master for bus #1.
3.2.2
ADM1032ARZ - Temperature Sensor
ON Semiconductor temperature sensor (ADM1032ARZ) utilized to monitor the
junction temperature of the CPU and board temperature. The I2C ID is 1001 100x
3.2.3
MCP7940N - Real Time Clock
The MCP7940N is a battery backed I2C real time clock. With having an external
32.768kHz crystal and a battery, this device can keep track of time while the system is off.
The I2C ID is 1101 111x. Microchip RTC device (MCP7940N) is installed on the system
to provide RTC function.
3.2.4
EEPROM
An EEPROM is utilized to store MAC address for the CN78xx, and other configuration
data. The I2C ID is 1010 100x ST Micro Electronics 512Kb EEPROM (M24512-
RMN6TP) is installed on the system to store customized information.
