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TL16C752CRHBR Datasheet(PDF) 29 Page - Texas Instruments

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Part # TL16C752CRHBR
Description  DUAL UART WITH 64-BYTE FIFO
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TL16C752CRHBR Datasheet(HTML) 29 Page - Texas Instruments

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PRINCIPLES OF OPERATION
Register Map
TL16C752C
DUAL UART
WITH 64-BYTE FIFO
SLLS646 – MARCH 2008
Each register is selected using address lines A[0], A[1], A[2] and, in some cases, bits from other registers. The
programming combinations for register selection are shown in Table 7.
Table 7. Register Map – Read/Write Properties(1)
A[2]
A[1]
A[0]
READ MODE
WRITE MODE
0
0
0
Receive holding register (RHR)
Transmit holding register (THR)
0
0
1
Interrupt enable register (IER)
Interrupt enable register
0
1
0
Interrupt identification register (IIR)
FIFO control register (FCR)
0
1
1
Line control register (LCR)
Line control register
1
0
0
Modem control register (MCR)
Modem control register
1
0
1
Line status register (LSR)
1
1
0
Modem status register (MSR)
1
1
1
Scratch register (SPR)
Scratch register (SPR)
0
0
0
Divisor latch LSB (DLL)
Divisor latch LSB (DLL)
0
0
1
Divisor latch MSB (DLH)
Divisor latch MSB (DLH)
1
0
0
Alternate function register (AFR)
Alternate function register (AFR)
0
1
0
Enhanced feature register (EFR)
Enhanced feature register
1
0
0
Xon-1 word
Xon-1 word
1
0
1
Xon-2 word
Xon-2 word
1
1
0
Xoff-1 word
Xoff-1 word
1
1
1
Xoff-2 word
Xoff-2 word
1
1
0
Transmission control register (TCR)
Transmission control register
1
1
1
Trigger level register (TLR)
Trigger level register
1
1
1
FIFO ready register
(1)
DLL and DLH are accessible only when LCR bit 7 is 1, and AFR is only accessible when LCR[7:5] = 100.
Enhanced feature register, Xon1, 2 and Xoff1, 2 are accessible only when LCR is set to 10111111 (8hBF).
Transmission control register and trigger level register are accessible only when EFR[4] = 1 and MCR[6] = 1, i.e. EFR[4] and MCR[6]
are read/write enables.
FCR FIFORdy register is accessible when any CS A–D = 0, MCR[2] = 1 and loopback MCR [4] = 0 is disabled.
MCR[7] can only be modified when EFR[4] is set.
Table 8 lists and describes the TL16C752C internal registers.
Copyright © 2008, Texas Instruments Incorporated
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