參數(shù)資料
型號: MC92600
廠商: Motorola, Inc.
英文描述: High-speed, Full-duplex, Serial Data Interface(高速全雙工串行數(shù)據(jù)接口)
中文描述: 高速,全雙工,串行數(shù)據(jù)接口(高速全雙工串行數(shù)據(jù)接口)
文件頁數(shù): 43/82頁
文件大小: 1056K
代理商: MC92600
Chapter 5. Test Modes
5-1
Chapter 5
Test Modes
The WarpLink Quad supports several test modes for in-system built-in self test (BIST) and
production testing. Test modes are selected through the TST_0, TST_1 and LBE signals.
Table 5-1 shows test mode state selection.
5.1 Loop Back System Test
The WarpLink Quad can be conTgured in loop back mode where the transmitted data is
looped back to its receiver independent of the receivers link inputs. This is enabled by
setting LBE high. The characters transmitted are controlled by the normal transmitter
controls. If the transceiver is working properly, the data/control characters transmitted are
received by the receiver. This allows system logic to use various data sequences to test the
operation of the transceiver.
The loop-back signals are electrically isolated from the XLINK_n_P/XLINK_n_N output
signals. Therefore, if the outputs are shorted, or otherwise restricted, the loop-back signals
still operate normally. When in loop-back mode, the LBOE signal controls the action of the
XLINK_n_P/XLINK_n_N output signals. When LBOE is low, the transmit driver holds the
XLINK_n_P/XLINK_n_N output signals high and low, respectively. When LBOE is high,
the XLINK_n_P/XLINK_n_N output signals continue to operate normally.
The receivers link input signals, RLINK_n_P and RLINK_n_N, are also electrically
isolated during loop back mode, such that their state does not affect the loop back path.
Table 5-1. Test Mode State Selection
TST_1
TST_0
LBE
Description
Low
Low
Low
Normal operation, no test mode enabled
Low
Low
High
Loop back system test mode (Section 5.1)
Low
High
Low
BIST sequence system test mode (Section 5.2)
Low
High
High
Loop back BIST sequence system test mode (Section 5.3)
High
Low
Low
Functional production test mode (Section 5.4)
High
Low
High
BIST production test mode (Section 5.5)
High
High
Dont care
PLL production test mode (Section 5.6)
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