P89CV51RC2FA NXP Semiconductors, P89CV51RC2FA Datasheet - Page 51

• Manufacturer Part Number: P89CV51RC2FA
• Description: MCU 8-Bit 89C 80C51 CISC 32KB Flash 5V 44-Pin PLCC Tube
• Manufacturer: NXP Semiconductors

Specifications of P89CV51RC2FA

• Package: 44PLCC
• Device Core: 80C51
• Family Name: 89C
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 32
• Interface Type: SPI/UART
• Number Of Timers: 3
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Program Memory Type: Flash
• Operating Temperature: -40 to 85 °C

NXP Semiconductors
P89CV51RB2_RC2_RD2_3
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. 03 — 25 August 2009
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. 2009. All rights reserved.
toggle
CCAPMn, n = 0 to 4
(DAH to DEH)
CCON
(D8H)
PCA
interrupt
002aaa540
CEXn
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