P8XC557E4 NXP Semiconductors, P8XC557E4 Datasheet - Page 16

• Manufacturer Part Number: P8XC557E4
• Description: The P80C557E4/P83C557E4/P89C557E4 (hereafter generically referred to as P8xC557E4) single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 8. Description of PWM1 bits
1999 Mar 02
Single-chip 8-bit microcontroller
PWM1 (FDH)
PWM1.0 to 7
BIT
PWM1.7
f
1/2
CLK
7
Figure 13. Functional Diagram of Pulse Width Modulated Outputs.
PWM1.6
LOW/HIGH ration of PWM1 signal =
Prescaler
PWMP
6
Figure 12. Pulse width register PWM1.
PWM1.5
5
8-Bit Comparator
8-Bit Comparator
PWM1.4
16
8-Bit Counter
4
P83C557E4/P80C557E4/P89C557E4
PWM0
PWM1
255 – (PWM1)
PWM1.3
3
FUNCTION
(PWM1)
PWM1.2
2
Output
Output
Buffer
Buffer
PWM1.1
1
Product specification
PWM0
PWM1
PWM1.0
0