P87C51RA2FA,512 NXP Semiconductors, P87C51RA2FA,512 Datasheet - Page 17

• Manufacturer Part Number: P87C51RA2FA,512
• Description: Microcontrollers (MCU) 8B MCU 8K-64K/256-1K 2.7-5.5V 33MHZ
• Manufacturer: NXP Semiconductors
• Series: 87Cr

Specifications of P87C51RA2FA,512

• Data Bus Width: 8 bit
• Program Memory Type: EPROM
• Program Memory Size: 8 KB
• Data Ram Size: 512 B
• Interface Type: UART
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC-44
• Minimum Operating Temperature: - 40 C
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Eeprom Size: -
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: -
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / Rohs Status: Details
• Other names: 935271890512

Philips Semiconductors
Table 3. Timer 2 Operating Modes
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.
*
T2EX Pin
RCLK + TCLK
Symbol
—
T2OE
DCEN
T2 Pin
T2MOD
User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features.
In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is
indeterminate.
OSC
X
0
0
1
Not Bit Addressable
Address = 0C9H
Function
Not implemented, reserved for future use.*
Timer 2 Output Enable bit.
Down Count Enable bit. When set, this allows Timer 2 to be configured as an up/down counter.
Bit
n*
Transition
Detector
—
7
C/T2 = 0
C/T2 = 1
CP/RL2
X
X
0
1
EXEN2
—
6
Figure 3. Timer 2 Mode (T2MOD) Control Register
Control
8KB/16KB/32KB/64KB OTP
TR2
Figure 2. Timer 2 in Capture Mode
—
5
Control
Capture
—
TR2
4
1
1
1
0
17
(8 BITS)
RCAP2L
TL2
—
3
16-bit Auto-reload
16-bit Capture
Baud rate generator
(off)
(8 BITS)
RCAP2H
TH2
—
2
P87C51RA2/RB2/RC2/RD2
T2OE
1
EXF2
TF2
MODE
Reset Value = XXXX XX00B
DCEN
0
Product data
SU01252
Interrupt
SU00729
Timer 2