XR16M890
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
T ABLE 19: UART RESET CONDITIONS
REV. 1.0.0
REGISTERS
DLM, DLL
(Both TX and RX)
DLD
RHR
THR
IER
FCR
ISR
LCR
MCR
LSR
SHR
MSR
SFR
SPR
GPIOLVL
EMSR
FC
TRG
FCTR
EFR
XON1
XON2
XOFF1
XOFF2
GPIOINT
GPIO3T
GPIOINV
GPIOSEL
I/O SIGNALS
TX
RTS#
DTR#
INT (Intel or VLIO mode)
IRQ# (Motorola mode)
RESET STATE
DLM = 0x00 and DLL = 0x01. Only resets to these values during a power up.
They do not reset when the Reset Pin is asserted.
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 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x60
Bits 7-0 = 0x00
Bits 7-0 =0xX0 (Bits 7-4 = complement of modem inputs)
Bits 7-0 = 0x00
Bits 7-0 = 0xFF
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x00
Bits 7-0 = 0x01
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 = 0xFF
RESET STATE
HIGH
HIGH
HIGH
Three-State Condition
HIGH
50
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