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15 real time clock battery, 16 debug support, 15 real time clock battery 4.16 debug support – Artesyn MVME4100ET Single Board Computer Installation and Use (June 2014) User Manual

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Functional Description

MVME4100ET Single Board Computer Installation and Use (6806800K76F)

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4.15 Real Time Clock Battery

There is an on-board battery holder that provides easy replacement of a +3.0 V button cell
lithium battery which provides back-up power to the on-board Real Time Clock. A battery
switching circuit provides automatic switching between the +3.3 V and battery voltages.

4.16 Debug Support

The MVME4100ET provides a boundary scan header for boundary scan test access and device
programming. The MVME4100ET also provides a separate standard COP header for processor
COP emulation. A signal from the boundary scan header controls a set of buffers that isolate
the MPC8548E onto a single device chain separate from the Boundary Scan chain containing
all of the scannable devices. This is a requirement of some COP debuggers to allow emulator
support for the MPC8548E.