UPSD3422E-40U6 STMicroelectronics, UPSD3422E-40U6 Datasheet - Page 104

• Manufacturer Part Number: UPSD3422E-40U6
• Description: MCU 8BIT 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3422E-40U6

• 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: 80KB (80K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 497-5577 - BOARD EVAL USB POWER SWITCH497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4903

Standard 8032 timer/counters
104/300
in use as a baud rate generator, the pin T2X can be used as an extra external interrupt, if
desired.
When Timer 2 is running (TR2 = 1) in a “timer” function in the Baud rate generator mode,
firmware should not read or write TH2 or TL2. Under these conditions the results of a read
or write may not be accurate. However, SFRs RCAP2H and RCAP2L may be read, but
should not be written, because a write might overlap a reload and cause write and/or reload
errors. Timer 2 should be turned off (clear TR2) before accessing Timer 2 or registers
RCAP2H and RCAP2L, in this case.
Table 63 on page 104
from Timer 2, with T2CON = 34h.
Table 63.
f
OSC
11.0592
11.0592
11.0592
11.0592
11.0592
36.864
36.864
36.864
36.864
36.864
40.0
40.0
40.0
40.0
40.0
36.0
36.0
36.0
24.0
24.0
24.0
24.0
12.0
12.0
MHz
Commonly used baud rates generated from timer2
(T2CON = 34h)
baud rate
Desired
115200
115200
115200
57600
28800
19200
57600
28800
19200
28800
19200
57600
28800
19200
28800
57600
28800
19200
9600
9600
9600
9600
9600
9600
shows commonly used baud rates and how they can be obtained
RCAP2H (hex)
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
Timer 2 SFRs
UPSD3422, UPSD3433, UPSD3434, UPSD3454
RCAP2L(hex)
EC
DC
EA
D5
BF
7E
D8
C4
D9
C5
8B
D9
B2
D9
FD
EE
F5
F6
F3
E6
F3
FA
F4
88
Resulting baud
113636
115200
115200
56818
29070
19231
57600
28800
19200
28846
19067
57692
28846
19231
28846
57600
28800
19200
9615
9600
9615
9615
9615
9600
rate
Baud rate
deviation
-1.36%
-1.36%
-0.69%
0.94%
0.16%
0.16%
0.16%
0.16%
0.16%
0.16%
0.16%
0.16%
0.16%
0.16%
0
0
0
0
0
0
0
0
0
0