xr20v2172 Exar Corporation, xr20v2172 Datasheet - Page 38

• Manufacturer Part Number: xr20v2172
• Description: Two Channel I2c/spi Uart With 64-byte Fifo And Rs232 Transceiver
• Manufacturer: Exar Corporation

XR20V2172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
N
OTE
: [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.
I/O SIGNALS
REGISTERS
DLM, DLL
IOIntEna
IOState
IOCont
XOFF1
XOFF2
RXLVL
TXLVL
EFCR
XON1
XON2
DTR#
RTS#
IODir
IRQ#
MCR
MSR
RHR
THR
FCR
SPR
TCR
DLD
LCR
LSR
EFR
TLR
IER
ISR
TX
T
ABLE
DLM = 0x00 and DLL = 0x01
Bits 7-0 = 0x00
Bits 7-0 = 0xXX
Bits 7-0 = 0xXX
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x01
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
Bits 7-0 = 0xFF
Bits 7-0 = 0x0F
Bits 7-0 = 0x00
Bits 7-0 = 0x40
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
HIGH
HIGH
HIGH
HIGH
16: UART RESET STATES
38
[1]
[1]
[1]
[1]
[1]
RESET STATE
RESET STATE
[1]
REV. 1.0.0