System information

EPM-15 Reference Manual 41

Special Registers

Special Control Register

SCR (READ/WRITE) 1D0h

D7 D6 D5 D4 D3 D2 D1 D0

PLED Reserved OVERTEMP Reserved Reserved Reserved Reserved Reserved

Table 16: Special Control Register Bit Assignments

Bit Mnemonic Description

D7 PLED Light Emitting Diode — Controls the programmable LED on connector J4

0 = Turns LED on

1 = Turns LED off

D6 Reserved Reserved — This bit has no function.

D5 OVERTEMP Temperature Status — Indicates CPU temperature.

0 = CPU temperature is below value set in the CMOS setup

1 = CPU temperature is above value set in the CMOS setup

This bit is read-only.

D4-D0 Reserved Reserved — These bits have no function.