W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 157

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

6.7
W90221X Provides 2 COM ports to interface external RS232 devices. COM0
allocates 0xf00003f8
~ oxf00003ff as its IO-space, while COM1 allocates 0xf00002f8 ~ 0xf00002ff
as its IO-space.
Table 6.7-1 : COM0 Register Map
Table 6.7-2 : COM1 Register Map
W90221X version 0.6
BA + 0x3f8,
BA + 0x3f8,
BA + 0x3f9,
BA + 0x3f8,
BA + 0x3f9,
BA + 0x2f8,
BA + 0x2f8,
BA + 0x2f9,
Port Addr.
BA + 0x3fa
BA + 0x3fa
BA + 0x3fc
BA + 0x3fd
BA + 0x3fe
Port Addr.
BA+ 0x3fb
BA + 0x3ff
DLAB = 0
DLAB = 0
DLAB = 1
DLAB = 1
DLAB = 1
DLAB = 0
DLAB = 0
COM PORT INTERFACE REGISTERS
MCR[0:7]
DLM[0:7]
MSR[0:7]
RBR[0:7]
THR[0:7]
FCR[0:7]
TOR[0:7]
RBR[0:7]
THR[0:7]
LCR[0:7]
LSR[0:7]
DLL[0:7]
Symbol
IER[3:7]
Symbol
IER[3:7]
IIR[0:7]
Acces
Acces
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
R
R
R
R
R
s
s
Description
Receiver Buffer Register
Transmitter Holding Register
Interrupt Enable Register
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
Description
Receiver Buffer Register
Transmitter Holding Register
Interrupt Enable Register
(IO base (BA) : 0xf0000000)
(IO base (BA) : 0xf0000000)
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