OM13013,598 NXP Semiconductors, OM13013,598 Datasheet - Page 172
OM13013,598
Manufacturer Part Number
OM13013,598
Description
BOARD DEMO IAR LPC1227 JLINKLITE
Manufacturer
NXP Semiconductors
Series
-r
Specifications of OM13013,598
Design Resources
LPC122x-SK Brd Schematic
Processor To Be Evaluated
LPC1227
Processor Series
LPC122x
Data Bus Width
32 bit
Interface Type
UART, SSP, SPI, I2C
Cpu Core
ARM Cortex-M0
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
3 V to 3.6 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-6885
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UM10441
User manual
a. Mode 0 (start bit and LSB are used for auto-baud)
16xbaud_rate
U0ACR start
rate counter
UARTn RX
2. A falling edge on UART RX pin triggers the beginning of the start bit. The rate
3. During the receipt of the start bit, 16 pulses are generated on the RSR baud input with
4. During the receipt of the start bit (and the character LSB for mode = 0) the rate
5. If Mode = 0 then the rate counter will stop on next falling edge of the UART RX pin. If
6. The rate counter is loaded into DLM/DLL and the baud-rate will be switched to normal
measuring counter will start counting UART_PCLK cycles optionally pre-scaled by the
fractional baud-rate generator.
the frequency of the (fractional baud-rate pre-scaled) UART input clock, guaranteeing
the start bit is stored in the RSR.
counter will continue incrementing with the pre-scaled UART input clock
(UART_PCLK).
Mode = 1 then the rate counter will stop on the next rising edge of the UART RX pin.
operation. After setting the DLM/DLL the end of auto-baud interrupt IIR ABEOInt will
be set, if enabled. The RSR will now continue receiving the remaining bits of the ”A/a"
character.
start
16 cycles
bit0
All information provided in this document is subject to legal disclaimers.
bit1
start bit
Rev. 1 — 15 February 2011
bit2
'A' (0x41) or 'a' (0x61)
bit3
bit4
16 cycles
bit5
bit6
LSB of 'A' or 'a'
bit7
Chapter 10: LPC122x UART1
parity stop
UM10441
© NXP B.V. 2011. All rights reserved.
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