P89LV51RD2BBC NXP Semiconductors, P89LV51RD2BBC Datasheet - Page 9

• Manufacturer Part Number: P89LV51RD2BBC
• Description: MCU 8-Bit 89LV 80C51 CISC 64KB Flash 3.3V 44-Pin TQFP Tray
• Manufacturer: NXP Semiconductors

Specifications of P89LV51RD2BBC

• Package: 44TQFP
• Device Core: 80C51
• Family Name: 89LV
• Maximum Speed: 40 MHz
• Ram Size: 1 KB
• Program Memory Size: 64 KB
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 32
• Interface Type: SPI/UART
• Operating Temperature: 0 to 70 °C
• Number Of Timers: 3

NXP Semiconductors
Table 3.
[1]
[2]
P89LV51RB2_RC2_RD2_5
Product data sheet
Symbol
ALE/PROG
n.c.
XTAL1
XTAL2
V
V
DD
SS
ALE loading issue: When ALE pin experiences higher loading (> 30 pF) during the reset, the microcontroller may accidentally enter into
modes other than normal working mode. The solution is to connect a pull-up resistor of 3 k to 50 k from pin ALE to V
For 6-clock mode, ALE is emitted at
P89LV51RB2/RC2/RD2 pin description
Pin
TQFP44
27
6, 17, 28,
39
15
14
38
16
PLCC44
33
1, 12, 23,
34
21
20
44
22
1
3
of crystal frequency.
Type
I/O
I/O
I
O
I
I
Rev. 05 — 15 December 2009
…continued
Description
Address Latch Enable: ALE is the output signal for latching the
low byte of the address during an access to external memory.
This pin is also the programming pulse input (PROG) for flash
programming. Normally the ALE
1
and clocking. One ALE pulse is skipped during each access to
external data memory. However, if bit AO is set to ‘1’, ALE is
disabled.
not connected
Crystal 1: Input to the inverting oscillator amplifier and input to
the internal clock generator circuits.
Crystal 2: Output from the inverting oscillator amplifier.
Power supply
Ground
6
the crystal frequency
P89LV51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
[2]
and can be used for external timing
[1]
is emitted at a constant rate of
© NXP B.V. 2009. All rights reserved.
DD
.
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