P87C591VFA/00,512 NXP Semiconductors, P87C591VFA/00,512 Datasheet - Page 64

• Manufacturer Part Number: P87C591VFA/00,512
• Description: IC 80C51 MCU 16K OTP 44-PLCC
• Manufacturer: NXP Semiconductors
• Series: 87Cr

Specifications of P87C591VFA/00,512

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: CAN, EBI/EMI, I²C, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: OTP
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Processor Series: P87C5x
• Core: 80C51
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: CAN, I2C, UART
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 6 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-1256-5; 935268182512; P87C591VFAA

Philips Semiconductors
With the baud rate generator as clock source for the serial
port in Mode 1 and Mode 3, the baud rate of can be
determined as follows:
Mode 1, 3 baud rate =
Baud rate generator overflow rate =
Table 47 lists baud rates and how they can be obtained
from the Internal Baud Rate Generator.
14.3.8
In Mode 1 and 3 of the serial port also timer 1 can be used
for generating baud rates. Then the baud rate is
determined by the timer 1 overflow rate and the value of
SMOD1 as follows:
Table 44 Serial Port Control Register SCON (address)
Table 45 Description of S0PSH and S0PSL bits
2000 Jul 26
2
S0PS: Baud Rate Generator Prescaler load value
Single-chip 8-bit microcontroller with CAN controller
12
BIT
SM0
- S0PS with S0PS = S0PSH.3 - 0, S0PSL.7 - 0.
7
6
5
4
3
2
1
0
7
-------------------------------------------------------------------------------------------------------- -
32 (baud rate generator overflow rate)
U
SING
2
SMOD1
T
SYMBOL
IMER
REN
SM0
SM1
SM2
RB8
TB8
SM1
RI
TI
6
1
osciillator frequency
TO
G
ENERATE
See Table 46.
See Table 46.
Enables the multiprocessor communication feature in Modes 2 and 3. In Mode 2 or
3, if SM2 is set to 1, then RI will not be activated if the received 9
Mode 1, if SM2 = 1 then RI will not be activated if a valid stop bit was not received. In
Mode 0, SM2 should be 0.
Enables serial reception. Set by software to enable reception. Clear by software to
disable reception.
The 9
desired.
In Modes 2 and 3, is the 9
the stop bit that was received. In Mode 0, RB8 is not used.
Transmit interrupt flag. Set by hardware at the end of the 8
the beginning of the stop bit in the other modes, in any serial transmission. Must be
cleared by software.
Receive interrupt flag. Set by hardware at the end of the 8
halfway through the stop bit time in the other modes, in any serial reception (except see
SM2). Must be cleared by software.
SM2
th
5
B
data bit that will be transmitted in Modes 2 and 3. Set or clear by software as
AUD
R
ATES
REN
4
th
64
data bit that was received. In Mode 1, if SM2 = 0, RB8 is
The Timer 1 interrupt is usually disabled in this application.
Timer 1 itself can be configured for either “timer” or
“counter” operation, and in any of its operating modes. In
most typical applications, it is configured for “timer”
operation in the auto-reload (high nibble of TMOD =
0010B). In this case the baud rate is given by the formula:
Very low baud rates can be achieved with Timer 1 if
leaving the Timer 1 interrupt enabled, configuring the timer
to run as 16-bit timer (high nibble of TMOD = 0001B), and
using the Timer 1 interrupt for a 16-bit software reload.
Table 49 lists lower baud rates and how they can be
obtained from Timer 1.
Mode 1, 3 baud rate
Mode1 3 baud rate =
TB8
3
DESCRIPTION
RB8
2
=
2
--------------------
2
------------------------------------------------------------------------------ -
SMOD1
SMOD1
32
32 6
th
th
bit time in Mode 0, or
bit time in Mode 0, or at
Preliminary Specification
th
(timer 1 overflow rate)
TI
1
oscillator frequency
data bit (RB8) is 0. In
256
P8xC591
–
TH1
RI
0