LPC47M107S-MS Standard Microsystems (SMSC), LPC47M107S-MS Datasheet - Page 65
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LPC47M107S-MS
Manufacturer Part Number
LPC47M107S-MS
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LPC47M107S-MS.pdf
(188 pages)
Specifications of LPC47M107S-MS
Pin Count
100
Lead Free Status / RoHS Status
Compliant
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NOTES ON SERIAL PORT OPERATION
FIFO MODE OPERATION:
GENERAL
The RCVR FIFO will hold up to 16 bytes regardless of which trigger level is selected.
TX AND RX FIFO OPERATION
The Tx portion of the UART transmits data through TXD as soon as the CPU loads a byte into the Tx FIFO. The UART
will prevent loads to the Tx FIFO if it currently holds 16 characters. Loading to the Tx FIFO will again be enabled
as soon as the next character is transferred to the Tx shift register.
autonomous operation of the Tx.
*DLAB is Bit 7 of the Line Control Register (ADDR = 3).
Note 1: Bit 0 is the least significant bit. It is the first bit serially transmitted or received.
Note 2: When operating in the XT mode, this bit will be set any time that the transmitter shift register is empty.
Note 3: This bit no longer has a pin associated with it.
Note 4: When operating in the XT mode, this register is not available.
Note 5: These bits are always zero in the non-FIFO mode.
Note 6: Writing a one to this bit has no effect. DMA modes are not supported in this chip.
Note 7: The UART1 and UART2 FCR’s are shadowed in the UART1 FIFO Control Shadow Register (runtime
Data Bit 2
Data Bit 2
Enable
Receiver Line
Status
Interrupt
(ELSI)
Interrupt ID Bit Interrupt ID Bit
XMIT FIFO
Reset
Number of
Stop Bits
(STB)
OUT1
(Note 3)
Parity Error
(PE)
Trailing Edge
Ring Indicator
(TERI)
Bit 2
Bit 2
Bit 10
register at offset 0x20) and UART2 FIFO Control Shadow Register (runtime register at offset 0x21).
BIT 2
Table 32 - Register Summary for an Individual UART Channel (continued)
Data Bit 3
Data Bit 3
Enable
MODEM
Status
Interrupt
(EMSI)
(Note 5)
DMA Mode
Select
6)
Parity Enable
(PEN)
OUT2
(Note 3)
Framing Error
(FE)
Delta Data
Carrier Detect
(DDCD)
Bit 3
Bit 3
Bit 11
BIT 3
(Note
Data Bit 4
Data Bit 4
0
0
Reserved
Even Parity
Select (EPS)
Loop
Break
Interrupt (BI)
Clear to Send
(CTS)
Bit 4
Bit 4
Bit 12
BIT 4
Page 65
Data Bit 5
Data Bit 5
0
Reserved
Stick Parity
0
Transmitter
Holding
Register
(THRE)
Data Set
Ready (DSR)
Bit 13
0
Bit 5
Bit 5
BIT 5
These capabilities account for the largely
Data Bit 6
Data Bit 6
0
FIFOs
Enabled
(Note 5)
RCVR Trigger
LSB
Set Break
0
Transmitter
Empty (TEMT)
(Note 2)
Ring Indicator
(RI)
Bit 6
Bit 6
Bit 14
BIT 6
Data Bit 7
Data Bit 7
0
FIFOs
Enabled
(Note 5)
RCVR Trigger
MSB
Divisor Latch
Access Bit
(DLAB)
0
Error in RCVR
FIFO (Note 5)
Data Carrier
Detect (DCD)
Bit 7
Bit 15
Bit 7
BIT 7
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