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: 61/178页
文件大小: 2247K
代理商: SCD223110QCD
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Datasheet
153
This register provides the initialization value for the timer prescaler that is itself clocked by a
prescaled clock equal to system clock
÷ 2048. The timer prescaler establishes the clock for the
various on-chip timers (including RTPR, TTR, and the general timers available to the host in the
Synchronous modes). The minimum value loaded in this register to maintain accuracy in the timer
is 0A hex.
8.7.2
Receive Timeout Period Register (RTPR) — Async Mode Only
8.7.2.1
Receive Timeout Period Register low (RTPRl) — Async Mode Only
8.7.2.2
Receive Timeout Period Register high (RTPRh) — Async Mode Only
Receive Timeout Period register (16 bits)
This value sets the receive data timeout period. As each character is moved to the receive FIFO or
the last data is transferred from the FIFO to the host, the receive timer (an internal timer) is
reloaded with the Receive Timeout Period register. The receive timer is decremented on each ‘tick’
of the prescaler counter, whose period is controlled by TPR. If the receive timer reaches zero, it
causes a receive data interrupt.
Register Name: RTPR
Register Description: Receive Timeout Period, 16-bit
Default Value: x’0000
Access: Word Read/Write
Intel Hex Address: x’26
Motorola Hex Address: x’24
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Binary value, bits 15:8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Binary value, bits 7:0
Register Name: RTPRl
Register Description: Receive Timeout Period, Low Byte
Default Value: x’00
Access: Byte Read/Write, ASYNC Mode Only
Intel Hex Address: x’26
Motorola Hex Address: x’25
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Binary value
Register Name: RTPRh
Register Description: Receive Timeout Period, High Byte
Default Value: x’00
Access: Byte Read/Write, ASYNC Mode Only
Intel Hex Address: x’27
Motorola Hex Address: x’24
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Binary value
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