ELAN Home Systems EM78P458 - Manual (Page 52)

EM78P458/459
OTP ROM
1: XTAL type
• Bit 11 (/ENWTD): Watchdog timer enable bit.
0: Enable
1: Disable
• Bit 10 (CLKS): Clocks of each instruction cycle.
0: Two clocks
1: Four clocks
Refer to the section of Instruction Set.
• Bit 9 (/PTB): Protect bit.
0: Enable
1: Disable
• Bit 8 (HLF): XTAL frequency selection.
0: Low frequency
1: High frequency
• Bit 7 (RCT): Resistor Capacitor
0: Inter C, External R
1: External RC
• Bit 6 (HLP): Power consumption selection.
0: Low power.
1: High power.
• Bit 5 ~ Bit 0 (ID[5]~ID[0]): Customer’s ID.
2. Code Option Register (Word 1)
Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4~Bit0
SIGN2 VOF2[2] VOF2[1] VOF2[0] SIGN1 VOF1[2] VOF1[1] VOF1[0] -
• Bit 12 (SIGN2): Polarity bit of offset voltage.
0: Negative voltage
1: Positive voltage
• Bit 11 ~ Bit 9 (VOF2[2]~VOF2[0]): Offset voltage bits
• Bit 8 (SIGN1): Polarity bit of offset voltage.
0: Negative voltage
1: Positive voltage
• Bit 7 ~ Bit 5 (VOF1[2]~VOF210)): Offset voltage bits
• Bit 4 ~ Bit 0 : Not used.
This specification is subject to change without prior notice. 07.01.2003 (V1.3) 52