P87C591VFA/00,512 NXP Semiconductors, P87C591VFA/00,512 Datasheet - Page 63

• 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
14.3.4
The baud rate in Mode 0 is fixed to:
14.3.5
The baud rate in Mode 2 depends on the value of bit
SMOD1 in Special Function Register PCON. If SMOD1 =
0 (which is the value after reset), the baud rate is
oscillator frequency. If SMOD1 = 1, the baud rate is
the oscillator frequency:
14.3.6
In these modes the baud rate is variable and can be
generated alternatively by a baud rate generator or by
Timer 1.
2000 Jul 26
Mode 2 baud rate
handbook, full pagewidth
Mode 0 baud rate
Single-chip 8-bit microcontroller with CAN controller
Note: The switch configuration shows the reset state.
B
B
B
AUD
AUD
AUD
R
R
R
ATE IN
ATE IN
ATE IN
f CLK
=
=
2
--------------------
M
oscillator frequency
-------------------------------------------------------
M
SMOD1
M
32
ODE
ODE
ODE
Fig.24 Serial Port Input Clock when using the Baud Rate Generator.
BAUD RATE
clock
input
S0PSH
0
2
1
AND
oscillator frequency
6
.3 .2 .1 .0
3
12 BIT TIMER
S0PSL
1
32
1
16
of
overflow
of
63
14.3.7
In Modes 1 and 3, the P8xC591 can use an internal baud
rate generator for the serial port. To enable this feature, bit
SPS (bit 7 of Special Function Register S0PSH) must be
set. Bit SMOD1 (PCON.7) controls a divide-by-2 circuit
which affect the input and output clock signal of the baud
rate generator. After reset the divide-by-2 circuit is active
and the resulting overflow output clock will be divided by 2.
The input clock of the baud rate generator is f
The baud rate generator consists of its own free running
upward counting 12-bit timer. On overflow of this timer
(next count step after counter value FFFH) there is an
automatic 12-bit reload from the registers S0PSL and
S0PSH. The lower 8 bits of the timer are reloaded from
S0PSL, while the upper four bits are reloaded from bit 0 to
3 of register S0PSH. The baud rate timer is reloaded by
writing to S0PSH.
U
2
SING THE
0
1
(SMOD1)
I
PCON.7
NTERNAL
MHI025
B
AUD
Preliminary Specification
BAUD
RATE
CLOCK
R
ATE
G
P8xC591
ENERATOR
CLK.