OXCF950_06 Datasheet, PDF (33/66 Pages) Oxford Semiconductor – low cost asynchronous 16-bit PC card or Compact Flash UART device

OXFORD SEMICONDUCTOR, INC.
OXCF950 rev B DATA SHEET
Register Address R/W Bit 7 Bit 6 Bit 5
Name
To access these registers LCR must be set to 0xBF
EFR
010
R/W CTS
RTS Special
flow
Flow
char
control control detect
XON1
100
R/W
9-bit mode
XON2
101
R/W
9-bit mode
XOFF1
110
R/W
9-bit mode
XOFF2
111
R/W
9-bit mode
Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
Enhanced
mode
In-band flow control mode
XON Character 1
Special character 1
XON Character 2
Special Character 2
XOFF Character 1
Special character 3
XOFF Character 2
Special character 4
Table 25: 650 Compatible Registers
Register
Name
ASR ^1,6,7
Address
001
R/W
R/W ⁷
RFL ⁶
011
R
Bit 7
Tx
Idle
Bit 6
FIFO
size
Bit 5 Bit 4 Bit 3 Bit 2
FIFO- Special DTR
RTS
SEL
Char
Detect
Number of characters in the receiver FIFO
Bit 1
Remote
Tx
Disabled
Bit 0
Tx
Disabled
TFL ^3,6
100
R
Number of characters in the transmitter FIFO
ICR ^3,8,9
101
R/W
Data read/written depends on the value written to the SPR prior to
the access of this register (see Table 27)
Table 26: 950 Specific Registers
Register access notes:
Note 1: Requires LCR[7] = 0
Note 2: Requires ACR[7] = 0
Note 3: Requires that last value written to LCR was not 0xBF
Note 4: To read this register ACR[7] must be = 0
Note 5: To read this register ACR[6] must be = 0
Note 6: Requires ACR[7] = 1
Note 7: Only bits 0 and 1 of this register can be written
Note 8: To read this register ACR[6] must be = 1
Note 9: This register acts as a window through which to read and write registers in the Indexed Control Register set
DS-0027 Feb 06
External—Free Release
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