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Z51F6412
Product Specification
PS030302-0212
P R E L I M I N A R Y
85
Table 11-9 PWM Frequency vs. Resolution at 8 Mhz
Resolution
Frequency
TxCK[2:0]=000 (125ns)
TxCK[2:0]=010 (500ns)
TxCK[2:0]=011 (1us)
16-bit 122.070Hz
30.469Hz
15.259Hz
15-bit 244.141Hz
60.938Hz
30.518Hz
10-bit 7.8125KHz
1.95KHz
976.563Hz
9-bit 15.625KHz
3.9KHz
1.953KHz
8-bit 31.25KHz
7.8KHz
3.906KHz
The POL bit of TxCR register decides the polarity of duty cycle. If the duty value is set same to the
period value, the PWM output is determined by the bit POL (1: High, 0: Low). And if the duty value is
set to "00H", the PWM output is determined by the bit POL (1: Low, 0: High).
P
R
E
S
C
A
L
E
R
÷ 1
÷ 4
÷ 8
÷ 16
÷ 64
÷ 256
÷ 1024
÷ 2048
MUX
TxH(8-bit)
TxL(8-bit)
TxST
TxEN
3
TxCK[2:0]
SCLK
TxIF
Timerx
Interrupt
-
-
-
-
-
ECEN
TxPE
POL
TxCR
TxCR1
comparator
PWMxHDR
(8-bit)
PWMxLDR
(8-bit)
TxEN
PWMxE
CAPx TxCK2 TxCK1 TxCK0
TxCN
TxST
16-bit Counter
PWMxHPR
(8-bit)
PWMxLPR
(8-bit)
PWMxHDR
(8-bit)
PWMxLDR
(8-bit)
Slave
Master
S
R
Q
clear
POL
TxPE
Px
/ PWMx
16-bit Timerx PWM Period Register
ADDRESS : BA
H
, C2
H
, CA
H
, 2F38
H
INITIAL VALUE : 0000 _0000
b
ADDRESS : BB
H
, C3
H
, CB
H
, 2F39
H
INITIAL VALUE : ---- _-000
b
ECx
Figure 11-19 PWM Mode