p89v51rb2 NXP Semiconductors, p89v51rb2 Datasheet - Page 53

• Manufacturer Part Number: p89v51rb2
• Description: 8-bit 80c51 5 V Low Power 16/32/64 Kb Flash Microcontroller With 1 Kb Ram
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V51RB2_RC2_RD2_4
Product data sheet
Fig 25. PCA high-speed output mode
Fig 26. PCA PWM mode
CCAPnL
write to
0
CCAPnH
write to
6.9.4 PWM mode
1
-
reset
ECOMn
All of the PCA modules can be used as PWM outputs
depends on the source for the PCA timer.
All of the modules will have the same frequency of output because they all share one and
only PCA timer. The duty cycle of each module is independently variable using the
module’s capture register CCAPnL. When the value of the PCA CL SFR is less than the
enable
1
enable
CAPPn
16-BIT COMPARATOR
CCAPnH
0
PCA timer/counter
CH
CF
-
CAPNn
0
ECOMn
CCAPnL
8-BIT COMPARATOR
CR
CL
PCA timer/counter
CCAPnH
CCAPnL
MATn
Rev. 04 — 1 May 2007
0
CAPPn
CL
0
-
match
TOGn
0
CAPNn
CCF4
0
PWMn
CL
CL
1
(to CCFn)
MATn
CCF3
P89V51RB2/RC2/RD2
1
CCAPnL
CCAPnL
ECCFn
8-bit microcontrollers with 80C51 core
1
TOGn
CCF2
0
1
0
(Figure
CCAPMn, n = 0 to 4
(DAH to DEH)
PWMn
CCF1
0
26). Output frequency
ECCFn
CCF0
002aaa541
CEXn
© NXP B.V. 2007. All rights reserved.
toggle
CCAPMn, n = 0 to 4
(DAH to DEH)
CCON
(D8H)
PCA
interrupt
002aaa540
CEXn
53 of 80