W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 63

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
63
Bits 6-7 Word Length Select
Modem Control Register (MCR)
Port address : 0xf00003fc (COM1)
Bits 3
Bit 4
Bit 5
Bit 6
Bit 7
Writing 0x00 to MCR set DTR#, RTS#, OUT1# and OUT2# to logic 1s, while
writing 0x0f to MCR reset DTR#, RTS#, OUT1# and OUT2# to logic 0s.
0
Enable Loop-Back mode
Complement version of OUT2# (user-designated output) signal
Complement version of OUT1# (user-designated output) signal
Complement version of RTS# (Request-To-Send) signal
Complement version of DTR# (Data-Terminal-Ready) signal
0 = Disable
1 = When loop-back is enable, the following signals is connected internally.
Reserved
LCR[6:7]
0xf00002fc (COM2)
0 0
0 1
1 0
1 1
SOUT connects to SIN
DTR# connects to DSR# internally and DTR# pin is fixed logic 1.
RTS# connects to CTS# internally and RTS# pin is fixed logic 1.
OUT1# connects to RI#
OUT2# connects to DCD# internally and OUT2# pin is fixed logic 1.
1
2
Character length
5 bits
6 bits
7 bits
8 bits
LOOP
3
internally and OUT1# pin is fixed logic 1.
internally and SOUT pin is fixed logic 1.
Read/Write
OUT2#
4
OUT1#
Power-on Default : 0x0
5
RTS#
6
DTR#
7
W90220F
Version 0.84