參數(shù)資料
型號(hào): PONE-000-01
廠商: Electronic Theatre Controls, Inc.
英文描述: The ideal device for simple nodes, such as switches, actuators and sensor
中文描述: 在簡(jiǎn)單的節(jié)點(diǎn),如交換機(jī),執(zhí)行器和傳感器的理想設(shè)備
文件頁(yè)數(shù): 15/56頁(yè)
文件大?。?/td> 432K
代理商: PONE-000-01
March 2000
CEWay
PL-One Data Sheet
D-CW-0100-04
Page 15 of 56
Current State
Ph_Request
_Reg
101x 0110
X01X XXXX
X01X XXXX
X01X XXXX
X01X XXXX
0000 0001
Next State
Transition
IDLE
XMIT_PRE_SYM
IDLE
IDLE
IDLE
IDLE
RCV_STAMP
Command to start transmission.
Abort reception.
Abort reception.
Abort reception.
Abort reception.
This indicates that the MACS needs one
more timestamp byte.
Bits 4, 2, and 1 indicate leading zero
suppression and field delimiter.
Abort transmission,
Bits 4, 2, and 1 indicate leading zero
suppression and field delimiter.
Abort transmission.
Abort transmission.
Complete transmission, does not require
any more timestamp bytes.
This indicates that the MACS needs one
more timestamp byte.
RCV_PRE_SYM
RCV_SYM
RCV_CRC
RCV_STAMP
RCV_STAMP
XMIT_PRE_SYM
101X 0XX0
XMIT_SYM
XMIT_PRE_SYM
XMIT_SYM
00XX XXXX
101X 0XX0
IDLE
XMIT_SYM
XMIT_SYM
XMIT_CRC
XMIT_STAMP
00XX XXXX
00XX XXXX
0000 0000
IDLE
IDLE
IDLE
XMIT_STAMP
1010 0001
XMIT_STAMP
Table 8 State Transitions Associated with Writes to Ph_Request_Reg
Timestamp Timer
The PLSES supports a free-running 32-bit timer that is used to associate a timestamp to any received or
transmitted packets. The resolution of this timestamp timer is 279 nsec (four oscillator cycles at 14.32
MHz, six cycles at 21.48 MHz.) For a received packet, the timestamp is acquired when the last CRC
symbol has been completely received. For a transmitted packet, the timestamp is acquired when the CRC
symbol has been completely transmitted. The least significant timestamp byte is transferred first, via
Ph_Rx_Buffer, at the same time as the end of transmission or reception is indicated. Up to three additional
timestamp bytes can be requested from the PLSES by writing 01 hex to the Ph_Request_Reg. These
bytes are transferred with the least significant byte first.
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