GMS87C4060 Datasheet, PDF (50/102 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C4040/87C4060
PRELIMINARY
14. Pulse Width Modulation (PWM)
The PWM circuit is shown in Figure 14-1 , Figure .
Example
(f_ex=8MHz)
Resolution
Input Clock
Frame cycle
14bit PWM
0.5uS
2MHz
8,192uS
8bit PWM
4uS
250KHz
1,024uS
The PWM circuit consists of the counter, comparator, Data
register.
The PWM control registers are PWMR7~0, PWMCR2~1,
PWM8H, PWM8L.
The more details about registers are shown Figure 14-2 .
PWMCR2 [EB_H]
PWMCR1 [EA_H]
CNTB
PWMR5 [E5_H]
PWMR4 [E4_H]
PWMR3 [E3_H]
PWMR2 [E2_H]
PWMR1 [E1_H]
PWMR0 [E0_H]
8bit comparator
PS5
8bit counter
Figure 14-1 8bit register (PWM7~0) circuit
PWM5
PWM4
PWM3
PWM2
PWM1
PWM0
IF1Frame
PWMCR2 [EB_H]
PWMCR1 [EA_H]
CNTB
PWMR8H 8bit [E8_H]
PWMR8L 6bit [E9_H]
MSB
14bit comparator
LSB
PS2
14bit counter
Figure 14-2 14bit register (PWM8) circuit
PWM8
46
PRELIMINARY
Nov. 1999 Ver 1.0