参数资料
型号: SCD223110QCD
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2 CHANNEL(S), 256K bps, SERIAL COMM CONTROLLER, PQFP100
封装: METRIC, QFP-100
文件页数: 3/178页
文件大小: 2247K
代理商: SCD223110QCD
CD2231 — Intelligent Two-Channel LAN and WAN Communications Controller
100
Datasheet
Note:
Do not use the STCR (Special Transmit Command register) to send XON and XOFF characters
while using automatic in-band flow control.
Bits 3:0
Receive flow control FIFO threshold
These four bits define the threshold for automatic flow control activation based on
the contents of the receive FIFO. A threshold value of zero disables this function and
the setting of bit 4 is ignored. Bit 4 determines whether the out-of-band (DTR pin)
or the in-band (XOFF/XON characters) is used to stop the flow of incoming data
from the remote transmitter.
When the number of characters in the FIFO exceeds this threshold, the DTR pin
deasserts or an XOFF character is transmitted. When the number of characters in the
FIFO is less than or equal to the threshold, the DTR asserts or and XON is transmit-
ted.
8.2.7
Channel Option Register 6 (COR6) — Async Mode Only
CR is defined as 0D hex, NL as 0A hex, and NULL as 00 hex.
Bits 7:5
These three bits are used to enable translation of received CR/NL characters as fol-
lows:
Bits 4:3
Break Action – These bits determine the action taken after a break condition is
received.
Register Name: COR6
Register Description: Channel Option Register 6
Default Value: x’00
Access: Byte Read/Write
Intel Hex Address: x’1B
Motorola Hex Address: x’18
Bit 7Bit 6Bit 5Bit 4Bit 3
Bit 2Bit 1
Bit 0
IgnCR
ICRNL
INLCF
IgnBrk
NBrkInt
ParMrk
INPCK
ParInt
IgnCr
ICrRNL
INLCR
0
No special action on CR and NL
0
1
NL translated to CR
0
1
0
CR translated to NL
0
1
CR translated to NL and NL translated to CR
1
0
CR discarded
1
0
1
CR discarded and NL translated to CR
1
0
CR discarded
1
CR discarded and NL translated to CR
IgnBrk
NBrkInt
0
Generate an exception interrupt
0
1
Translate to a NULL character
10
Reserved
1
Discard character
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