P89CV51RD2FBC,557 NXP Semiconductors, P89CV51RD2FBC,557 Datasheet - Page 29

• Manufacturer Part Number: P89CV51RD2FBC,557
• Description: IC 80C51 MCU FLASH 64K 44-TQFP
• Manufacturer: NXP Semiconductors
• Series: 89Cr

Specifications of P89CV51RD2FBC,557

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: P89CV5x
• Core: 80C51
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, UART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Cpu Family: 89C
• Device Core: 80C51
• Device Core Size: 8b
• Frequency (max): 40MHz
• Total Internal Ram Size: 1KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-4257; 935284103557; P89CV51RD2FBC

NXP Semiconductors
P89CV51RB2_RC2_RD2_3
Product data sheet
6.4.2 Mode 1
6.4.3 Mode 2
6.4.4 Mode 3
Mode 1 is the same as Mode 0, except that all 16 bits of the timer register (THn and TLn)
are used; see
Mode 2 configures the timer register as an 8-bit counter (TLn) with automatic reload, as
shown in
contents of THn, which must be preset by software. The reload leaves THn unchanged.
Mode 2 operation is the same for Timer 0 and Timer 1.
When Timer 1 is in Mode 3 it is stopped (holds its count). The effect is the same as setting
TR1 = 0.
Timer 0 in Mode 3 establishes TL0 and TH0 as two separate 8-bit counters. The logic for
Mode 3 and Timer 0 is shown in
T0GATE, TR0, INT0, and TF0. TH0 is locked into a timer function (counting machine
cycles) and takes over the use of TR1 and TF1 from Timer 1. Thus, TH0 now controls the
Timer 1 interrupt.
Mode 3 is provided for applications that require an extra 8-bit timer. With Timer 0 in
mode 3, the P89CV51RB2/RC2/RD2 can look like it has an additional timer.
Note: When Timer 0 is in Mode 3, Timer 1 can be turned on and off by switching it into
and out of its own Mode 3. It can still be used by the serial port as a baud rate generator,
or in any application not requiring an interrupt.
Fig 8.
Fig 9.
INTn pin
TnGate
INTn pin
Tn pin
osc/6
TnGate
TRn
Tn pin
osc/6
TRn
Timer/counter 0 or 1 in Mode 1 (16-bit counter)
Figure
Timer/counter 0 or 1 in Mode 2 (8-bit auto-reload)
Figure
9. Overflow from TLn not only sets TFn, but also reloads TLn with the
8.
Rev. 03 — 25 August 2009
C/T = 0
C/T = 1
C/T = 0
C/T = 1
Figure
10. TL0 uses the Timer 0 control bits: T0C/T,
P89CV51RB2/RC2/RD2
control
control
(8-bits)
TLn
(8-bits)
(8-bits)
TLn
THn
reload
(8-bits)
THn
overflow
80C51 with 1 kB RAM, SPI
overflow
TFn
© NXP B.V. 2009. All rights reserved.
TFn
interrupt
002aaa521
002aaa520
interrupt
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