W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 158

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Receiver Buffer Register (RBR)
Port address : 0xf00003f8, DLAB=0 (COM0)
Default : --
Bits 0-7
pin.
Transmitter Holding Register (THR)
Port address : 0xf00002f8, DLAB=0 (COM0)
Default : --
W90221X version 0.6
BA + 0x2f8,
BA + 0x2f9,
BA + 0x2fa
BA + 0x2fa
BA + 0x2fc
BA + 0x2fd
BA + 0x2fe
BA+ 0x2fb
BA + 0x2ff
DLAB = 1
DLAB = 1
DLAB = 1
0
0
Reading this register, COM port returns 8-bit data receiving from SDI
0xf00002f8, DLAB=0 (COM1)
0xf00002f8, DLAB=0 (COM1)
1
1
Receiver Data
MCR[0:7]
DLM[0:7]
MSR[0:7]
FCR[0:7]
TOR[0:7]
LCR[0:7]
LSR[0:7]
DLL[0:7]
IIR[0:7]
2
2
8-bit Receiver Data
8-bit Transmit Data
R/W
R/W
R/W
R/W
R/W
W
R
R
R
3
3
Divisor Latch Register (LS)
Divisor Latch Register (MS)
Interrupt Identification Register
FIFO Control Register
Line Control Register
Modem Control Register
Line Status Register
MODEM Status Register
Time Out Register
4
4
Read only
Write only
5
5
6
6
Power-on
Power-on
7
7
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