參數(shù)資料
型號： MC92602ZTA
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PBGA196
封裝： 15 X 15 MM, 1.60 MM HEIGHT, 1 MM PITCH, MAPBGA-196
文件頁數(shù)： 20/102頁
文件大?。?/td> 1581K
代理商： MC92602ZTA
2-4
MC92602 SerDes Reference Manual
MOTOROLA
Functional Description
2.3
Functional Description
The transmitter takes the data byte presented at its data input, creates a transmission
character using its 8B/10B encoder (if not in ten-bit interface mode), and serially transmits
the character out of the differential link output pads. The following sections provide a
detailed description of the transmitter and its various modes of operation.
2.3.1
Transmit Data Input Register Operation
Transmit data is sampled and stored in the input register on the rising and falling edge of
the appropriate transmit clock. This results in the accumulation of 10 transmit bits per
complete clock cycle.
The transmit data input register accepts data to be transmitted and synchronizes it to the
internal clock domain. Transmit data may be uncoded 8-bit data or coded 10-bit data,
depending on the state of the control input, TBIE. The ten-bit interface mode, TBI, is
enabled by asserting ten-bit interface enable, TBIE, high. Table 2-2 and Table 2-3 describe
the meaning of each transmit data bit depending on the state of TBIE.
Internal Signals
rx_clock
High-speed transceiver
clock
Internal, differential high-speed clock used
to transmit and receive link data.
Input
—
repeat_data
Repeater data
Internal data from the receiver to be used
when REPE is active.
Input
—
loop_back_data
Loopback data
Differential loopback transmit data.
Output
—
Table 2-2. Conversion of Transmitter Inputs to Internal Transmit Data (TBIE = Low)
Clock Edge
XMIT_x_K
XMIT_x_3
XMIT_x_2
XMIT_x_1
XMIT_x_0
Rising
K
Data bit 3
Data bit 2
Data bit 1
Data bit 0 (LSB)
Falling
Idle
Data bit 7 (MSB)
Data bit 6
Data bit 5
Data bit 4
Table 2-3. Conversion of Transmitter Inputs to Internal Transmit Data (TBIE = High)
Clock Edge
XMIT_x_K
XMIT_x_3
XMIT_x_2
XMIT_x_1
XMIT_x_0
Rising
Data bit 4
Data bit 3
Data bit 2
Data bit 1
Data bit 0 (LSB)
Falling
Data bit 9 (MSB)
Data bit 8
Data bit 7
Data bit 6
Data bit 5
Table 2-1. MC92602 Transmitter Interface Signals (continued)
Signal Name
Description
Function
Direction
Active
State
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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