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: 15/178页
文件大小: 2247K
代理商: SCD223110QCD
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Datasheet
111
Bits 2:0
These three bits select the clock source for the receive baud rate generator or DPLL.
NOTE: See the description of clock options in Section 5.5.
8.3.2
Transmit Baud Rate Generator Registers
8.3.2.1
Transmit Baud Rate Period Register (TBPR)
This register contains the preload value for the transmit baud rate count. When using one of the
internal clocks or an n-times external clock, the preload value in conjunction with the transmitter
clock source chosen, determines the transmit bit rate. If a 1
× external clock or the receive clock is
used, a value of 01h must be loaded in the TBPR.
Dpllmd1
Dpllmd0
Encoding
0
NRZ
0
1
NRZI
1
0
Manchester
11
Reserved
clkSel2
clkSel1
clkSel0
Clock Source
0
Clk 0
0
1
Clk 1
0
1
0
Clk 2
0
1
Clk 3
1
0
Clk 4
1
0
1
Reserved
1
0
External clock
1
Reserved
Register Name: TBPR
Register Description: Transmit Bit-Rate Period
Default Value: x’81
Access: Byte Read/Write
Intel Hex Address: x’C1
Motorola Hex Address: x’C3
Bit 7
Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Transmit bit rate period (divisor)
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