UPSD3433E-40T6 STMicroelectronics, UPSD3433E-40T6 Datasheet - Page 111

• 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

UPSD3422, UPSD3433, UPSD3434, UPSD3454
21.3.1
21.3.2
Using timer 1 to generate baud rates
When Timer 1 is used as the baud rate generator (bits RCLK = 0, TCLK = 0), the baud rates
in Modes 1 and 3 are determined by the Timer 1 overflow rate and the value of SMOD as
follows:
The Timer 1 Interrupt should be disabled in this application. The Timer itself can be
configured for either “timer” or “counter” operation, and in any of its 3 running modes. In the
most typical applications, it is configured for “timer” operation, in the Auto-reload Mode (high
nibble of the SFR TMOD = 0010B). In that case the baud rate is given by the formula:
Table 69
1.
Using timer/counter 2 to generate baud rates
See
Table 69.
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
Modes 1 or 3
UART mode f
Mode 0 Max
Mode 2 Max
Mode 2 Max
Section 20.6.3: Baud rate generator mode on page
lists various commonly used baud rates and how they can be obtained from Timer
Mode 1,3 Baud Rate =
(2
Mode 1,3 Baud Rate =
(2
SMOD
SMOD
Commonly used baud rates generated from timer 1
OSC
11.0592
11.0592
11.0592
11.0592
33.333
33.333
33.333
33.333
40.0
40.0
40.0
40.0
40.0
36.0
24.0
12.0
/ 32) x (Timer 1 overflow rate)
/ 32) x (f
MHz
1250 000 1250 000
3.33MHz
OSC
Desired
625 000
19200
19200
57600
28800
19200
57600
28800
19200
baud
9600
9600
9600
4800
9600
rate
/ (12 x [256 – (TH1)]))
Resultant
baud rate
3.33MHz
625 000
18939
18570
57870
28934
19290
57600
28800
19200
9470
9645
9615
4808
9600
deviation
-1.36%
-1.36%
-2.34%
0.47%
0.47%
0.47%
0.47%
0.16%
0.16%
Baud
rate
0
0
0
0
0
0
0
103.
SMOD
PCON
bit in
X
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
C/T Bit
TMOD
Serial UART interfaces
in
X
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
TMOD
Timer 1
Timer
mode
in
X
X
X
2
2
2
2
2
2
2
2
2
2
2
2
2
reload
value
(hex)
111/300
TH1
EA
FD
EE
FD
F5
F6
FA
FF
FE
FA
F7
F3
F3
X
X
X