XR20V2170 Datasheet, PDF (37/52 Pages) Exar Corporation – I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER

REV. 1.0.0
XR20V2170
I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
TABLE 16: UART RESET STATES
REGISTERS
DLM, DLL
DLD
RESET STATE
DLM = 0x00 and DLL = 0x01^[1]
Bits 7-0 = 0x00
RHR
THR
IER
FCR
ISR
Bits 7-0 = 0xXX
Bits 7-0 = 0xXX
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x01
LCR
MCR
LSR
MSR
Bits 7-0 = 0x1D
Bits 7-0 = 0x00
Bits 7-0 = 0x60
Bits 3-0 = Logic 0
Bits 7-4 = Logic levels of the inputs inverted
SPR
Bits 7-0 = 0xFF^[1]
TCR
TLR
TXLVL
RXLVL
IODir
Bits 7-0 = 0x0F
Bits 7-0 = 0x00
Bits 7-0 = 0x40
Bits 7-0 = 0x00
Bits 7-0 = 0x00
IOState
IOIntEna
IOCont
EFCR
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
EFR
XON1
Bits 7-0 = 0x00
Bits 7-0 = 0x00^[1]
XON2
Bits 7-0 = 0x00^[1]
XOFF1
XOFF2
I/O SIGNALS
Bits 7-0 = 0x00^[1]
Bits 7-0 = 0x00^[1]
RESET STATE
TX
OP2#
RTS#
DTR#
IRQ#
HIGH
HIGH
HIGH
HIGH
HIGH
NOTE: [1] Only resets to these values during a power up. They do not reset when the RESET# pin is asserted or during
software reset IOCont[3] = 1.
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