LPC1343FHN33,551 NXP Semiconductors, LPC1343FHN33,551 Datasheet - Page 179

• Manufacturer Part Number: LPC1343FHN33,551
• Description: IC MCU 32BIT 32KB FLASH 33HVQFN
• Manufacturer: NXP Semiconductors
• Series: LPC13xxr

Specifications of LPC1343FHN33,551

• Program Memory Type: FLASH
• Program Memory Size: 32KB (32K x 8)
• Package / Case: 33-VQFN Exposed Pad, 33-HVQFN, 33-SQFN, 33-DHVQFN
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 72MHz
• Connectivity: I²C, Microwire, SPI, SSI, SSP, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC13
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 8 KB
• Interface Type: I2C, UART
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 28
• Number Of Timers: 4
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, KSK-LPC1343
• Development Tools By Supplier: OM11039, OM11040, OM11046, OM11048
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Package: 33HVQFN EP
• Device Core: ARM Cortex M3
• Family Name: LPC1000
• Maximum Speed: 72 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4944; 935289655551

NXP Semiconductors
UM10375
User manual
11.6.13 Auto-baud
Table 201. Auto-baud Control Register (U0ACR - address 0x4000 8020) bit description
The UART auto-baud function can be used to measure the incoming baud rate based on
the ”AT" protocol (Hayes command). If enabled the auto-baud feature will measure the bit
time of the receive data stream and set the divisor latch registers U0DLM and U0DLL
accordingly.
Auto-baud is started by setting the U0ACR Start bit. Auto-baud can be stopped by clearing
the U0ACR Start bit. The Start bit will clear once auto-baud has finished and reading the
bit will return the status of auto-baud (pending/finished).
Two auto-baud measuring modes are available which can be selected by the U0ACR
Mode bit. In Mode 0 the baud rate is measured on two subsequent falling edges of the
UART Rx pin (the falling edge of the start bit and the falling edge of the least significant
bit). In Mode 1 the baud rate is measured between the falling edge and the subsequent
rising edge of the UART Rx pin (the length of the start bit).
Bit
0
1
2
7:3
8
9
31:10 -
Symbol
Start
Mode
AutoRestart 0
-
ABEOIntClr
ABTOIntClr
All information provided in this document is subject to legal disclaimers.
Value Description
0
1
0
1
1
NA
0
1
0
1
NA
Rev. 2 — 7 July 2010
This bit is automatically cleared after auto-baud
completion.
Auto-baud stop (auto-baud is not running).
Auto-baud start (auto-baud is running). Auto-baud run
bit. This bit is automatically cleared after auto-baud
completion.
Auto-baud mode select bit.
Mode 0.
Mode 1.
No restart
Restart in case of time-out (counter restarts at next
UART Rx falling edge)
Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is not
defined.
End of auto-baud interrupt clear bit (write only
accessible).
Writing a 0 has no impact.
Writing a 1 will clear the corresponding interrupt in the
U0IIR.
Auto-baud time-out interrupt clear bit (write only
accessible).
Writing a 0 has no impact.
Writing a 1 will clear the corresponding interrupt in the
U0IIR.
Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is not
defined.
Chapter 11: LPC13xx UART
UM10375
© NXP B.V. 2010. All rights reserved.
0
Reset value
0
0
0
0
0
0
0
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