Motorola MVME3100 manual I2C Serial Interface and Devices, Flash Memory, Control and Timers Logic

Chapter 4 Functional Description

Flash Memory

The MVME3100 provides one physical bank of soldered-on Flash memory. The bank is composed of two physical Flash devices configured to operate in 16-bit mode to form a 32-bit Flash bank. The default configuration for the MVME3100-1263 is 128MB using two 512Mb devices, and for the MVME3100-1152 it is 64MB using two 256Mb devices.

Refer to the MVME3100 Single-Board Computer Programmer’s Reference Guide listed in Appendix B, Related Documentation, for more information.

Control and Timers Logic

The MVME3100 control and timers logic resides on the local bus. This logic provides the following functions on the board:

■Local bus address latch

■Chip selects for Flash banks and QUART

■System Control and Status registers

■Four 32-bit tick timers

■Real-time clock (RTC) 1 MHz reference clock

Refer to the MVME3100 Single-Board Computer Programmer’s Reference Guide listed in Appendix B, Related Documentation, for more information.

I2C Serial Interface and Devices

The MVME3100 provides the following on-board I2C serial devices connected to the MPC8540 I2C controller interface:

■8KB serial EEPROM for VPD

■Two 64KB serial EEPROMs for user configuration data storage

■256 byte serial EEPROM on SODIMM for SPD

■Maxim DS1375 RTC

■Maxim DS1621 temperature sensor

■8KB serial EEPROM on RTM VPD

The Maxim DS1375 RTC implemented on the MVME3100 provides an alarm interrupt routed to the MPC8540 programmable interrupt controller (PIC). A Maxim DS32KHz temperature controlled crystal oscillator provides the RTC reference. A battery backup circuit for the RTC is provided on board.

The Maxim DS1621 digital temperature sensor provides a measure of the temperature of the board.

40MVME3100 Installation and Use (V3100A/IH1)