CD2401 Intel, CD2401 Datasheet - Page 153
CD2401
Manufacturer Part Number
CD2401
Description
Multi-protocol Communications Controller
Manufacturer
Intel
Datasheet
1.CD2401.pdf
(176 pages)
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8.7
8.7.1
8.7.2
8.7.2.1
Datasheet
Register Name: TPR
Register Description: Timer Period
Default Value: x’FF
Access: Byte Read/Write
Register Name: RTPR
Register Description: Receive Timeout Period, 16-bits
Default Value: x’0000
Access: Word Read/Write – Async mode only
Register Name: RTPRl
Register Description: Receive Timeout Period – low byte
Default Value: x’00
Access: Byte Read/Write – Async mode only
Bit 15
Bit 7
Bit 7
Bit 7
Timer Registers
Timer Period Register (TPR)
This register provides the initialization value for the timer prescaler that is itself clocked by a
prescaled clock equal to system clock
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.
Receive Timeout Period Register (RTPR)
Receive Timeout Period Register – Low (RTPRl) – Async Mode only
Bit 14
Bit 6
Bit 6
Bit 6
Bit 13
Bit 5
Bit 5
Bit 5
Bit 12
Binary Value bits 15:8
Bit 4
Bit 4
Bit 4
Binary Value bits 7:0
Multi-Protocol Communications Controller — CD2401
Binary Value
Binary Value
2048. The timer prescaler establishes the clock for the
Bit 11
Bit 3
Bit 3
Bit 3
–
Bit 10
Bit 2
Bit 2
Bit 2
Async Mode only
Motorola Hex Address: x’DA
Motorola Hex Address: x’24
Motorola Hex Address: x’25
Bit 9
Bit 1
Bit 1
Bit 1
Intel Hex Address: x’D8
Intel Hex Address: x’26
Intel Hex Address: x’26
Bit 8
Bit 0
Bit 0
Bit 0
153
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