XR17V254 Datasheet, PDF (57/70 Pages) Exar Corporation – 66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT

REV. 1.0.0
XR17V254
66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
TABLE 21: UART RESET CONDITIONS
REGISTERS
RESET STATE
I/O SIGNALS
DLL
Bits [7:0] = 0x01
TX[ch-3:0]
DLM
Bits [7:0] = 0x00
IRTX[ch-3:0]
DLD
Bits [7:0] = 0x00
RTS#[ch-3:0]
RHR
Bits [7:0] = 0xXX
DTR#[ch-3:0]
THR
Bits [7:0] = 0xXX
EECK
IER
Bits [7:0] = 0x00
EECS
FCR
ISR
Bits [7:0] = 0x00
Bits [7:0] = 0x01
EEDI
LCR
Bits [7:0] = 0x00
MCR
Bits [7:0] = 0x00
LSR
Bits [7:0] = 0x60
MSR
Bits [3:0] = logic 0
Bits [7:4] = logic levels of the inputs
SPR
Bits [7:0] = 0xFF
FCTR
Bits [7:0] = 0x00
EFR
Bits [7:0] = 0x00
TFCNT
Bits [7:0] = 0x00
TFTRG
Bits [7:0] = 0x00
RFCNT
Bits [7:0] = 0x00
RFTRG
Bits [7:0] = 0x00
XCHAR
Bits [7:0] = 0x00
XON1
Bits [7:0] = 0x00
XON2
Bits [7:0] = 0x00
XOFF1
Bits [7:0] = 0x00
XOFF2
Bits [7:0] = 0x00
RESET STATE
HIGH
LOW
HIGH
HIGH
LOW
LOW
LOW
57