P87C54X2FBD NXP Semiconductors, P87C54X2FBD Datasheet - Page 20

• Manufacturer Part Number: P87C54X2FBD
• Description: MCU 8-Bit 87C 80C51 CISC 16KB EPROM 5V 44-Pin LQFP Tray
• Manufacturer: NXP Semiconductors

Specifications of P87C54X2FBD

• Package: 44LQFP
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 33 MHz
• Ram Size: 256 Byte
• Program Memory Size: 16 KB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 32
• Interface Type: UART
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

Philips Semiconductors
2003 Jan 24
*n = 6 in 6-clock mode; n = 12 in 12-clock mode.
*n = 6 in 6-clock mode; n = 12 in 12-clock mode.
80C51 8-bit microcontroller family
4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),
low power, high speed (30/33 MHz)
T2EX PIN
OSC
OSC
T2 Pin
T2 Pin
TRANSITION
DETECTOR
n*
n*
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
EXEN2
Figure 9. Timer 2 in Auto-Reload Mode (DCEN = 0)
Figure 10. Timer 2 Auto Reload Mode (DCEN = 1)
CONTROL
TR2
TR2
CONTROL
CONTROL
(DOWN COUNTING RELOAD VALUE)
RELOAD
(UP COUNTING RELOAD VALUE)
RCAP2L
FFH
TL2
20
(8-BITS)
RCAP2L
TL2
RCAP2H
FFH
TH2
(8-BITS)
RCAP2H
TH2
OVERFLOW
P80C3xX2; P80C5xX2;
T2EX PIN
EXF2
TF2
COUNT
DIRECTION
1 = UP
0 = DOWN
TOGGLE
TF2
P87C5xX2
INTERRUPT
EXF2
Product data
SU01624
TIMER 2
SU01623
INTERRUPT