P87C51RB2BBD NXP Semiconductors, P87C51RB2BBD Datasheet - Page 18

• Manufacturer Part Number: P87C51RB2BBD
• Description: MCU 8-Bit 87C 80C51 CISC 16KB EPROM 3.3V/5V 44-Pin LQFP Tray
• Manufacturer: NXP Semiconductors

Specifications of P87C51RB2BBD

• Package: 44LQFP
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 33 MHz
• Ram Size: 512 Byte
• Program Memory Size: 16 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 32
• Interface Type: UART
• Operating Temperature: 0 to 70 °C
• Number Of Timers: 3

Philips Semiconductors
2003 Jan 24
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
* n = 6 in 6-clock mode, or 12 in 12-clock mode.
* n = 6 in 6-clock mode, or 12 in 12-clock mode.
T2EX PIN
OSC
T2 PIN
OSC
T2 PIN
n*
TRANSITION
DETECTOR
n*
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
EXEN2
TR2
Figure 4. Timer 2 in Auto-Reload Mode (DCEN = 0)
8KB/16KB/32KB/64KB OTP
CONTROL
Figure 5. Timer 2 Auto Reload Mode (DCEN = 1)
CONTROL
TR2
(DOWN COUNTING RELOAD VALUE)
CONTROL
(UP COUNTING RELOAD VALUE)
RELOAD
RCAP2L
FFH
TL2
18
(8 BITS)
RCAP2L
RCAP2H
TL2
FFH
TH2
(8 BITS)
OVERFLOW
RCAP2H
TH2
P87C51RA2/RB2/RC2/RD2
T2EX PIN
EXF2
TF2
COUNT
DIRECTION
1 = UP
0 = DOWN
TOGGLE
TF2
EXF2
INTERRUPT
INTERRUPT
SU01254
Product data
TIMER 2
SU01253