UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 102

• Manufacturer Part Number: UPSD3433EB40U6
• Description: MCU 8BIT 8032 128KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433EB40U6

• 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: 46
• 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: 80-TQFP, 80-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5660

Serial UART interfaces
21.3
102/293
Table 48.
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
SM0
Bit
7
6
5
4
3
2
1
0
Mode 0 Baud Rate = f
Mode 2 Baud Rate = (2
SCON1: serial port UART1 control register (SFR D8h, reset value 00h)
Symbol
Bit 6
SM1
SM0
SM1
SM2
REN
RB8
TB8
RI
TI
Bit 5
SM2
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
Bit 4
REN
/ 64) x f
OSC
Bit 3
TB8
Table 46 on page
Definition
Bit 2
RB8
Bit 1
OSC
TI
100.
. If SMOD = 1,
uPSD34xx
Bit 0
RI