ELAN Home Systems EM78P458 - Manual (Page 20)

EM78P458/459
OTP ROM
• Bit 1 : Bit 0 ( T1P1:T1P0 ): TMR1 clock prescale option bits.
T1P1 T1P0 Prescale
0 0 1:2(Default)
0 1 1:8
1 0 1:32
1 1 1:64
12. IOC61 ( DT1L: the Least Significant Byte ( Bit 7 ~ Bit 0) of Duty Cycle of
PWM1 )
A specified value keeps the output of PWM1 to stay at high until the value matches with TMR1.
13. IOC71 ( DT1H: the Most Significant Byte ( Bit 1 ~ Bit 0 ) of Duty Cycle of
PWM1 )
7 6 5 4 3 2 1 0
CALI1 SIGN1 VOF1[2] VOF1[1] VOF1[0] - PWM1[9] PWM1[8]
• Bit 7 (CALI1): Calibration enable bit
0 = Calibration disable;
1 = Calibration enable.
• Bit 6 (SIGN1): Polarity bit of offset voltage
0 = Negative voltage;
1 = Positive voltage.
• Bit 5:Bit 3 (VOF1[2]:VOF1[0]): Offset voltage bits.
• Bit 1:Bit 0 (PWM1[9]:PWM1[8]): The Most Significant Byte of PWM1 Duty Cycle
A specified value keeps the PWM1 output to stay at high until the value matches with TMR1.
14. IOC81 ( PRD1: Period of PWM1 ):
The content of IOC81 is a period (time base) of PWM1. The frequency of PWM1 is the reverse of the
period.
15. IOC91 ( DT2L: the Least Significant Byte ( Bit 7 ~ Bit 0 ) of Duty Cycle of
PWM2 )
A specified value keeps the of PWM1 output to stay at high until the value matches with TMR2.
16. IOCA1 ( DT2H: the Most Significant Byte ( Bit 1 ~ Bit 0 ) of Duty Cycle of
PWM2 )
7 6 5 4 3 2 1 0
CALI2 SIGN2 VOF2[2] VOF2[1] VOF2[0] - PWM2[9] PWM2[8]
This specification is subject to change without prior notice. 07.01.2003 (V1.3) 20
• Bit 7 (CALI2): Calibration enable bit