HT46C62 Holtek Semiconductor, HT46C62 Datasheet - Page 20

• Manufacturer Part Number: HT46C62
• Description: A/D with LCD Type 8-Bit MCU
• Manufacturer: Holtek Semiconductor

A (7+1) bits mode PWM cycle is divided into two modu-
lation cycles (modulation cycle0~modulation cycle 1).
Each modulation cycle has 128 PWM input clock period.
In a (7+1) bits PWM function, the contents of the PWM
register is divided into two groups. Group 1 of the PWM
register is denoted by DC which is the value of
PWM.7~PWM.1. The group 2 is denoted by AC which is
the value of PWM.0.
In a (7+1) bits mode PWM cycle, the duty cycle of each
modulation cycle is shown in the table.
Rev. 1.60
Modulation cycle i
Parameter
(i=0~1)
AC (0~1)
i<AC
i³AC
Duty Cycle
DC + 1
128
DC
128
(6+2) PWM Mode
(7+1) PWM Mode
20
The modulation frequency, cycle frequency and cycle
duty of the PWM output signal are summarized in the
following table.
f
f
SYS
SYS
Modulation Frequency
/64 for (6+2) bits mode
/128 for (7+1) bits mode
PWM
HT46R62/HT46C62
PWM Cycle
Frequency
f
SYS
/256
July 14, 2005
PWM Cycle
[PWM]/256
Duty