em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 39

• Manufacturer Part Number: em78p134n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.6) 06.02.2010
(This specification is subject to change without further notice)
5.7 PWM (Pulse Width Modulation)
5.7.1 Overview
In PWM mode, the PWM pins produce up to a 10-bit resolution PWM output (see the
functional block diagram below). A PWM output consists of a time period and a duty
cycle, and it keeps the output high. The baud rate of the PWM is the inverse of the time
period. Figure 5-13 PWM Output Timing depicts the relationships between a time
period and a duty cycle.
/IRQn
VCC
/RESET
1:128
1:256
1:16
1:64
1:8
1:4
1:2
1:1
TP2
D
RF
Fosc
CLK
TP1
P
R
C
L
MUX
TP0
Q
Q
_
Figure 5-12 PWM Functional Block Diagram
TEN
Figure 5-11 Interrupt input Circuit
DTH+DTL
IOCF
Q
Q
_
IOCFRD
TMRH+TMRL
RFWR
PRD
P
C
L
R
CLK
Comparator
Comparator
D
RFRD
DLH+DLL
8-Bit Microcontroller with OTP ROM
IOCFWR
reset
IRQn
IRQm
latch
Period
match
match
S
R
Duty
TO PWMIF
Q
Data bus
EM78P134N
PWME
IOD
ENI/DISI
PWM
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INT