Maxim Integrated MAX31782 - Manual (Page 83)

  MaximIntegrated 9-2
MAX31782 User’s Guide
Revision 0; 8/11
SECTION 9: PWM OUTPUTS
The MAX31782 provides six independent PWM output pins that can be used for power-supply margining or fan speed
control . When the PWM output functionality of a pin is disabled, that pin can be used as a general-purpose input/output
(GPIO) . A diagram for one individual PWM output block is shown in
Figure 9-1 .
Figure 9-1. PWM Output Block Diagram
PWMPS[2:0]
15
PWMCn
0
15 0
001
010
011
100
101
11x
000
SYSTEM CLOCK/4
SYSTEM CLOCK/16
SYSTEM CLOCK/64
SYSTEM CLOCK/256
SYSTEM CLOCK/1024
SYSTEM CLOCK/1
SYSTEM CLOCK/1
4MHz
SYSTEM
CLOCK
CLOCK
PRESCALER
PWMEN
THIS DIAGRAM SHOWS ONE OF THE SIX INDEPENDENT PWM OUTPUTS.
THE ‘n’ SUFFIX IS USED TO DENOTE THE NAME OF THE PWM OUTPUT’S
PIN AND REGISTERS, WHERE n = 0 TO 5. THE BITS AND FLAGS SHOWN
ARE LOCATED IN EACH PWM’S CONTROL REGISTER, PWMCNn.
PWMRn
COMPARE
PWMVn
0000h
PWMCS
PWMCR
TFB = 1
ETB
PWMn
INTERRUPT
PWM.n
PIN