This interface card is used in conjunction with the CICE48R52A006A.

The external clock source has two modes, RC and Crystal. If a crystal clock is to be used, positions 2 and 3 should be shorted on J1 and a suitable crystal inserted into location Y1. Otherwise, if an RC clock is to be used, positions 1 and 2 should be shorted and the system frequency adjusted using VR1. Refer to the Tools/Mask Option menu of the HT-IDE3000 User's Guide for the clock source and system frequency selection.