XR16C872CQ EXAR [Exar Corporation], XR16C872CQ Datasheet - Page 45

• Manufacturer Part Number: XR16C872CQ
• Description: DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
• Manufacturer: EXAR [Exar Corporation]

UART Registers Reset Conditions
REGISTER
RHR
THR
IER
FCR
ISR
LCR
MCR
LSR
MSR
SPR
DLL
DLM
TRG
FCTR
EFR
Xon-1
Xon-2
Xoff-1
Xoff-2
EMSR
OUTPUT
SIGNALS
TX A-B
RTS# A-B
DTR# A-B
Rev. 1.00
0xXX, X=random
0xXX, X=random
0x00
0x00
0x01
0x00
0x00
0x60
0xX0, X=state of input pins
0xFF
0xXX, X=random
0xXX, X=random
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
RESET STATE
logic 1
logic 1
logic 1
RESET STATE
DISCONTINUED
45
1284 Controller Register Reset Conditions
REGISTER
ECP-AFIFO
DSR
DCR
EPP-APort
EPP-DPortA
EPP-DPortB
EPP-DPortC
EPP-DPortD
CONF-A
CONF-B
ECR
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0xXX, X=state of input pins
Bit 0-4=0
Bit 0-7=0
Bit 0-5=0
0x95
RESET STATE
XR16C872