xr16v554 Exar Corporation, xr16v554 Datasheet - Page 29

• Manufacturer Part Number: xr16v554
• Description: 2.25v To 3.6v Quad Uart With 16-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.2
T
I/O SIGNALS
REGISTERS
ABLE
DLM, DLL
(16 Mode)
(68 Mode)
RXRDY#
TXRDY#
DTR#
RTS#
MCR
IRQ#
RHR
MSR
THR
FCR
LCR
SPR
LSR
IER
ISR
INT
TX
13: UART RESET CONDITIONS FOR CHANNELS A-D
DLM = 0x00 and DLL = 0x01. Only resets to these val-
ues during a power up. They do not reset when the
Reset Pin is asserted.
Bits 7-0 = 0xXX
Bits 7-0 = 0xXX
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x01
Bits 7-0 = 0x00
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
HIGH
HIGH
HIGH
HIGH
LOW
XR16V554 = Three-State Condition (INTSEL = LOW)
XR16V554 = LOW (INTSEL = HIGH)
XR16V554D = LOW
HIGH (INTSEL = LOW)
29
RESET STATE
RESET STATE
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
XR16V554/554D