UPSD3433E-40T6 STMicroelectronics, UPSD3433E-40T6 Datasheet - Page 110

• Manufacturer Part Number: UPSD3433E-40T6
• Description: MCU 8BIT 8032 128KB FLASH 52TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433E-40T6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-TQFP, 52-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4906

Serial UART interfaces
21.3
110/300
Table 68.
UART baud rates
The baud rate in Mode 0 is fixed:
The baud rate in Mode 2 depends on the value of the bit SMOD in the SFR named PCON. If
SMOD = 0 (default value), the baud rate is 1/64 the oscillator frequency, f
the baud rate is 1/32 the oscillator frequency.
Baud rates in Modes 1 and 3 are determined by the Timer 1 or Timer 2 overflow rate.
Bit
7
6
5
4
3
2
1
0
Mode 0 Baud Rate = f
Mode 2 Baud Rate = (2
SCON1 register bit definition
Symbol
REN
SM0
SM1
SM2
TB8
RB8
RI
TI
R,W
R/W
R,W
R,W
R,W
R,W
R,W
R,W
R,W
OSC
SMOD
Serial Mode Select, See
Important, notice bit order of SM0 and SM1.
[SM0:SM1] = 00b, Mode 0
[SM0:SM1] = 01b, Mode 1
[SM0:SM1] = 10b, Mode 2
[SM0:SM1] = 11b, Mode 3
Serial Multiprocessor Communication Enable.
Mode 0: SM2 has no effect but should remain 0.
Mode 1: If SM2 = 0 then stop bit ignored. SM2 =1 then RI
active if stop bit = 1.
Mode 2 and 3: Multiprocessor Comm Enable. If SM2=0, 9th
bit is ignored. If SM2=1, RI active when 9th bit = 1.
Receive Enable.
If REN=0, UART reception disabled. If REN=1, reception is
enabled
TB8 is assigned to the 9th transmission bit in Mode 2 and 3.
Not used in Mode 0 and 1.
Mode 0: RB8 is not used.
Mode 1: If SM2 = 0, the RB8 is the level of the received stop
bit.
Mode 2 and 3: RB8 is the 9th data bit that was received in
Mode 2 and 3.
Transmit Interrupt flag.
Causes interrupt at end of 8th bit time when transmitting in
Mode 0, or at beginning of stop bit transmission in other
modes. Must clear flag with firmware.
Receive Interrupt flag.
Causes interrupt at end of 8th bit time when receiving in Mode
0, or halfway through stop bit reception in other modes (see
SM2 for exception). Must clear this flag with firmware.
/ 12
/ 64) x f
UPSD3422, UPSD3433, UPSD3434, UPSD3454
OSC
Table 64 on page
Definition
OSC
108.
. If SMOD = 1,