p89cv51rb2 NXP Semiconductors, p89cv51rb2 Datasheet - Page 48

• Manufacturer Part Number: p89cv51rb2
• Description: P89cv51rb2/rc2/rd2 8-bit 80c51 5 V Low Power 64 Kb Flash Microcontroller With 1 Kb Ram, Spi, 6-clock Cpu With 6/12-clock Peripherals
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89CV51RB2_RC2_RD2_1
Product data sheet
Fig 23. PCA High-speed output mode
Fig 24. PCA PWM mode
CCAPnL
write to
0
CCAPnH
write to
6.9.4 Pulse width modulator 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 output frequency because they all share only one
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 value in 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
Rev. 01 — 5 October 2007
CCAPnH
CCAPnL
MATn
0
CAPPn
CL
0
-
match
TOGn
0
CAPNn
CCF4
0
PWMn
P89CV51RB2/RC2/RD2
CL
CL
1
(to CCFn)
MATn
CCF3
1
CCAPnL
CCAPnL
ECCFn
1
TOGn
CCF2
0
1
0
(Figure
CCAPMn, n = 0 to 4
(DAH to DEH)
PWMn
CCF1
0
80C51 with 1 kB RAM, SPI
24). 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
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