P89V51RB2FA,529 NXP Semiconductors, P89V51RB2FA,529 Datasheet - Page 35
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P89V51RB2FA,529
Manufacturer Part Number
P89V51RB2FA,529
Description
IC 80C51 MCU FLASH 16K 44-PLCC
Manufacturer
NXP Semiconductors
Series
89Vr
Datasheet
1.P89V51RC2FBC557.pdf
(80 pages)
Specifications of P89V51RB2FA,529
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (16K 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-PLCC
Processor Series
P89V5x
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
5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Minimum Operating Temperature
- 40 C
For Use With
622-1017 - BOARD 44-ZIF PLCC SOCKET622-1001 - USB IN-CIRCUIT PROG 80C51ISP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Other names
568-2427-5
935278706529
P89V51RB2FA-S
935278706529
P89V51RB2FA-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
P89V51RB2FA,529
Manufacturer:
NXP Semiconductors
Quantity:
10 000
NXP Semiconductors
P89V51RB2_RC2_RD2_5
Product data sheet
Fig 14. Timer 2 in Auto Reload mode (DCEN = 1)
OSC
T2 pin
6.5.3 Programmable clock-out
6.5.4 Baud rate generator mode
6
When a logic 0 is applied at pin T2EX this causes Timer 2 to count down. The timer will
underflow when TL2 and TH2 become equal to the value stored in RCAP2L and
RCAP2H. Timer 2 underflow sets the TF2 flag and causes 0FFFFH to be reloaded into
the timer registers TL2 and TH2. The external flag EXF2 toggles when Timer 2 underflows
or overflows. This EXF2 bit can be used as a 17th bit of resolution if needed.
A 50 % duty cycle clock can be programmed to come out on pin T2 (P1.0). This pin,
besides being a regular I/O pin, has two additional functions. It can be programmed:
To configure the Timer/counter 2 as a clock generator, bit C/T2 (in T2CON) must be
cleared and bit T2OE in T2MOD must be set. Bit TR2 (T2CON.2) also must be set to start
the timer.
The Clock-Out frequency depends on the oscillator frequency and the reload value of
Timer 2 capture registers (RCAP2H, RCAP2L) as shown in
Where (RCAP2H,RCAP2L) = the content of RCAP2H and RCAP2L taken as a 16-bit
unsigned integer.
In the Clock-Out mode Timer 2 roll-overs will not generate an interrupt. This is similar to
when it is used as a baud-rate generator.
Bits TCLK and/or RCLK in T2CON allow the UART) transmit and receive baud rates to be
derived from either Timer 1 or Timer 2 (See
When TCLK = 0, Timer 1 is used as the UART transmit baud rate generator. When
---------------------------------------------------------------------------------------- -
2
1. To input the external clock for Timer/counter 2, or
2. To output a 50 % duty cycle clock ranging from 122 Hz to 8 MHz at a 16 MHz
operating frequency.
65536
OscillatorFrequency
C/T2 = 0
C/T2 = 1
RCAP2H RCAP2L
Rev. 05 — 12 November 2009
TR2
control
(down-counting reload value)
(up-counting reload value)
RCAP2L RCAP2H
(8-bits)
FFH
TL2
(8-bits)
FFH
TH2
P89V51RB2/RC2/RD2
Section 6.6 “UARTs” on page 37
8-bit microcontrollers with 80C51 core
underflow
overflow
T2EX pin
Equation
count direction
1 = up
0 = down
toggle
TF2
2:
© NXP B.V. 2009. All rights reserved.
002aaa525
EXF2
timer 2
interrupt
for details).
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