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: 9/178页
文件大小: 2247K
代理商: SCD223110QCD
CD2231 — Intelligent Two-Channel LAN and WAN Communications Controller
106
Datasheet
8.2.13
CRC Polynomial Select Register (CPSR)
Bits 7:1
Reserved – must be ‘0’.
Bit 0
Polynomial select
0 = CRC V.41 polynomial (normally used for HDLC protocol and preset to 1’s)
x**16 + x**12 + x**5 + 1
1= CRC-16 polynomial (generally used for Bisync but will work in HDLC mode,
preset to 0’s)
x**16 + x**15 + x**2 + 1
8.2.14
Transmit Special Mapped Characters — PPP Mode only
8.2.14.1
Transmit Special Mapped Character 1 (TSPMAP1)
8.2.14.2
Transmit Special Mapped Character 2 (TSPMAP2)
Register Name: CPSR
Register Description: CRC Polynomial Select
Default Value: x’00
Access: Byte Read/Write
Intel Hex Address: x’D4
Motorola Hex Address: x’D6
Bit 7Bit 6Bit 5Bit 4Bit 3
Bit 2Bit 1
Bit 0
00
000
00
Poly
Register Name: TSMAP1
Register Description: Special Mapped Transmit Character 1
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
User-defined mapped transmit character
Register Name: TSMAP2
Register Description: Special Mapped Transmit Character 2
Default Value: x’00
Access: Byte Read/Write
Intel Hex Address: x’04
Motorola Hex Address: x’07
Bit 7Bit 6Bit 5Bit 4Bit 3
Bit 2Bit 1
Bit 0
User-defined mapped transmit character
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