TS87C51RB2-LIA Atmel, TS87C51RB2-LIA Datasheet - Page 34

• Manufacturer Part Number: TS87C51RB2-LIA
• Description: IC MCU 8BIT 16K OTP 30MHZ 40-DIP
• Manufacturer: Atmel
• Series: 87Cr

Specifications of TS87C51RB2-LIA

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 30/20MHz
• Connectivity: 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): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.6. TS80C51Rx2 Serial I/O Port
The serial I/O port in the TS80C51Rx2 is compatible with the serial I/O port in the 80C52.
It provides both synchronous and asynchronous communication modes. It operates as an Universal Asynchronous
Receiver and Transmitter (UART) in three full-duplex modes (Modes 1, 2 and 3). Asynchronous transmission and
reception can occur simultaneously and at different baud rates
Serial I/O port includes the following enhancements:
6.6.1. Framing Error Detection
Framing bit error detection is provided for the three asynchronous modes (modes 1, 2 and 3). To enable the framing
bit error detection feature, set SMOD0 bit in PCON register (See Figure 13).
When this feature is enabled, the receiver checks each incoming data frame for a valid stop bit. An invalid stop
bit may result from noise on the serial lines or from simultaneous transmission by two CPUs. If a valid stop bit
is not found, the Framing Error bit (FE) in SCON register (See Table 16.) bit is set.
34
Framing error detection
Automatic address recognition
SM0/FE
SMOD1
SMOD0
SM1
Figure 13. Framing Error Block Diagram
SM2
-
REN
Set FE bit if stop bit is 0 (framing error) (SMOD0 = 1)
SM0 to UART mode control (SMOD = 0)
POF
To UART framing error control
TB8
GF1
RB8
GF0
PD
TI
IDL
RI
SCON (98h)
PCON (87h)
Rev. C - 06 March, 2001