Specifications

Hardware Description

ID052914 Non-Confidential

2.2.1 Power up reset

A full system configuration is performed at power up. See the ARM

Versatile

™

Express

Configuration Technical Reference Manual.

2.2.2 ON/OFF/Soft Reset push button briefly pressed

You can reset the system by briefly pressing the ON/OFF/Soft Reset switch on the back panel.

This performs a software reset of the ARM test chip on the CoreTile daughterboard. The MCC

and Daughterboard Configuration Controller reset the devices in the system, but do not perform

a full re-initialization:

1. The reset switch is briefly pressed and the MCC starts a reset sequence.

Caution

If the ON/OFF/Soft Reset switch is pressed and held for more than two seconds, the

system enters the Standby State, in the same way as pressing the black Hardware RESET

push button.

2. The MCC asserts the CB_nRST reset signal. Depending on the setting of

ASSERTNPOR

the generic configuration file

config.txt

, CB_nPOR might also be asserted.

3. The daughterboards and IO FPGA are reset.

4. The MCC also releases CB_nPOR if it was specified in the configuration file.

MCC releases CB_nRST.

5. The daughterboards enter the run state.

Note

No daughterboard configuration files are read as a result of an external reset. No daughterboard

re-configuration is performed.

2.2.3 Hardware RESET push button

You can change the operation of the board from ON to Standby by briefly pressing this button.

This switches off the power to the daughterboards and resets the system to the default values.