OM13006,598 NXP Semiconductors, OM13006,598 Datasheet - Page 75

• Manufacturer Part Number: OM13006,598
• Description: BOARD EVAL EM773 METER EU PLUG
• Manufacturer: NXP Semiconductors
• Type: Other Power Managementr

Specifications of OM13006,598

• Design Resources: Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: EM773FHN33,551
• Interface Type: USB
• Maximum Operating Temperature: + 150 C
• Operating Supply Voltage: 1.8 V to 3.6 V
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: EM773, OL2381
• Other names: 568-6681

NXP Semiconductors
UM10415
User manual
9.6.1 UART Receiver Buffer Register (U0RBR - 0x4000 8000, when
9.6.2 UART Transmitter Holding Register (U0THR - 0x4000 8000 when
9.6.3 UART Divisor Latch LSB and MSB Registers (U0DLL - 0x4000 8000
DLAB = 0, Read Only)
The U0RBR is the top byte of the UART RX FIFO. The top byte of the RX FIFO contains
the oldest character received and can be read via the bus interface. The LSB (bit 0)
represents the “oldest” received data bit. If the character received is less than 8 bits, the
unused MSBs are padded with zeroes.
The Divisor Latch Access Bit (DLAB) in U0LCR must be zero in order to access the
U0RBR. The U0RBR is always Read Only.
Since PE, FE and BI bits (see
RBR FIFO (i.e. the one that will be read in the next read from the RBR), the right approach
for fetching the valid pair of received byte and its status bits is first to read the content of
the U0LSR register, and then to read a byte from the U0RBR.
Table 90.
DLAB = 0, Write Only)
The U0THR is the top byte of the UART TX FIFO. The top byte is the newest character in
the TX FIFO and can be written via the bus interface. The LSB represents the first bit to
transmit.
The Divisor Latch Access Bit (DLAB) in U0LCR must be zero in order to access the
U0THR. The U0THR is always Write Only.
Table 91.
and U0DLM - 0x4000 8004, when DLAB = 1)
The UART Divisor Latch is part of the UART Baud Rate Generator and holds the value
used, along with the Fractional Divider, to divide the UART_PCLK clock in order to
produce the baud rate clock, which must be 16x the desired baud rate. The U0DLL and
U0DLM registers together form a 16-bit divisor where U0DLL contains the lower 8 bits of
the divisor and U0DLM contains the higher 8 bits of the divisor. A 0x0000 value is treated
like a 0x0001 value as division by zero is not allowed.The Divisor Latch Access Bit
(DLAB) in U0LCR must be one in order to access the UART Divisor Latches. Details on
how to select the right value for U0DLL and U0DLM can be found in
Bit
7:0
31:8 -
Bit
7:0
31:8 -
RBR
THR
Symbol
Symbol
UART Receiver Buffer Register (U0RBR - address 0x4000 8000 when DLAB = 0,
Read Only) bit description
UART Transmitter Holding Register (U0THR - address 0x4000 8000 when
DLAB = 0, Write Only) bit description
All information provided in this document is subject to legal disclaimers.
Description
The UART Receiver Buffer Register contains the oldest received
byte in the UART RX FIFO.
Reserved
Description
Writing to the UART Transmit Holding Register causes the data
to be stored in the UART transmit FIFO. The byte will be sent
when it reaches the bottom of the FIFO and the transmitter is
available.
Reserved
Rev. 1 — 10 September 2010
Chapter 9: EM773 Universal Asynchronous Transmitter (UART)
Table
101) correspond to the byte sitting on the top of the
Section
UM10415
© NXP B.V. 2010. All rights reserved.
Reset Value
undefined
-
Reset Value
NA
-
9.6.15.
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