UPSD3454E-40U6 STMicroelectronics, UPSD3454E-40U6 Datasheet - Page 116
![no-image](/images/manufacturer_photos/0/6/637/stmicroelectronics_sml.jpg)
UPSD3454E-40U6
Manufacturer Part Number
UPSD3454E-40U6
Description
MCU 8BIT 8032 256K FLASH 80-TQFP
Manufacturer
STMicroelectronics
Series
µPSDr
Datasheet
1.UPSD3422EV-40U6.pdf
(300 pages)
Specifications of UPSD3454E-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
288KB (288K x 8)
Program Memory Type
FLASH
Ram Size
32K 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 READER
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPSD3454E-40U6
Manufacturer:
STMicroelectronics
Quantity:
10 000
- Current page: 116 of 300
- Download datasheet (3Mb)
Serial UART interfaces
21.6
116/300
More about UART modes 2 and 3
For Mode 2, refer to the block diagram in
Figure 35 on page
and timing diagram in
Keep in mind that the baud rate is programmable to either 1/32 or 1/64 of f
but Mode 3 uses a variable baud rate generated from Timer 1 or Timer 2 rollovers.
The receive portion is exactly the same as in Mode 1. The transmit portion differs from Mode
1 only in the 9th bit of the transmit shift register.
Transmission is initiated by any instruction which writes to SBUF. At the end of a write
operation to SBUF, the TB8 Bit is loaded into the 9th position of the transmit shift register
and flags the TX Control unit that a transmission is requested. Transmission actually starts
at the end of the MCU the machine cycle following the next rollover in the divide-by-16
counter. Thus, the bit times are synchronized to the divide-by-16 counter, not to the writing
of SBUF. Transmission begins with activation of SEND which puts the start bit at pin TxD.
One bit time later, DATA is activated, which enables the output bit of the transmit shift
register to pin TxD. The first shift pulse occurs one bit time after that. The first shift clocks a
'1' (the stop bit) into the 9th bit position of the shift register. There-after, only zeros are
clocked in. Thus, as data bits shift out to the right, zeros are clocked in from the left. When
bit TB8 is at the output position of the shift register, then the stop bit is just to the left of TB8,
and all positions to the left of that contain zeros. This condition flags the TX Control unit to
do one last shift and then deactivate SEND, and set the interrupt flag, TI. This occurs at the
11th divide-by 16 rollover after writing to SBUF.
Reception is initiated by a detected 1-to-0 transition at pin RxD. For this purpose RxD is
sampled at a rate of 16 times whatever baud rate has been established. When a transition is
detected, the divide-by-16 counter is immediately reset, and 1FFH is written to the input shift
register. At the 7th, 8th, and 9th counter states of each bit time, the bit detector samples the
value of RxD. The value accepted is the value that was seen in at least 2 of the 3 samples. If
the value accepted during the first bit time is not '0,' the receive circuits are reset and the
unit goes back to looking for another '1'-to-'0' transition. If the start bit proves valid, it is
shifted into the input shift register, and reception of the rest of the frame will proceed. As
data bits come in from the right, '1s' shift out to the left. When the start bit arrives at the left-
most position in the shift register (which in Modes 2 and 3 is a 9-bit register), it flags the RX
Control unit to do one last shift, load SBUF and RB8, and set the interrupt flag RI. The signal
to load SBUF and RB8, and to set RI, will be generated if, and only if, the following
conditions are met at the time the final shift pulse is generated:
1.
2.
RI = 0, and
Either SM2 = 0, or the received 9th data bit = 1. If either of these conditions is not met,
the received frame is irretrievably lost, and RI is not set. If both conditions are met, the
received 9th data bit goes into RB8, and the first 8 data bits go into SBUF. One bit time
later, whether the above conditions were met or not, the unit goes back to looking for a
'1'-to-'0' transition on pin RxD.
117. For Mode 3, refer to the block diagram in
Figure 37 on page
Figure 34 on page
118.
UPSD3422, UPSD3433, UPSD3434, UPSD3454
117, and timing diagram in
Figure 36 on page
OSC
in Mode 2,
118,
Related parts for UPSD3454E-40U6
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![UPSD3454E-40T6](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU 8BIT 8032 256K FLASH 52-TQFP
Manufacturer:
STMicroelectronics
Datasheet:
![HCF4040BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [RIPPLE-CARRY BINARY COUNTER/DIVIDERS]
Manufacturer:
STMicroelectronics
Datasheet:
![HCF4054BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [LIQUID-CRYSTAL DISPLAY DRIVERS]
Manufacturer:
STMicroelectronics
Datasheet:
![STEVAL-MKI062V2](/photos/28/39/283999/steval-mki062v2_tmb.jpg)
Part Number:
Description:
BOARD EVAL FOR MEMS SENSORS
Manufacturer:
STMicroelectronics
Datasheet:
![BUT32V](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
NPN TRANSISTOR POWER MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![STTA12006TV2](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
TURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
Manufacturer:
STMicroelectronics
Datasheet:
![E110NS20FD](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Manufacturer:
STMicroelectronics
Datasheet:
![MDS50-800](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![MDS35-800](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![E16N100](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Search -----> STE16N100
Manufacturer:
STMicroelectronics
Datasheet:
![E53NA50](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Search ---> STE53NA50
Manufacturer:
STMicroelectronics
Datasheet:
![BUV98AF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
NPN Transistor Power Module
Manufacturer:
STMicroelectronics
Datasheet: