參數(shù)資料
型號(hào)： MSX340-PB480
元件分類： 數(shù)字信號(hào)處理外設(shè)
英文描述： DSP-CROSSBAR SWITCH, PBGA480
封裝： PLASTIC, BGA-480
文件頁數(shù)： 7/61頁
文件大?。?/td> 1437K
代理商： MSX340-PB480
MSX Family Data Sheet
I-Cube, Inc.
[Rev. 1.10] 9/5/01
15
RCA[6]
RCA[6] is set to a one if the IOB is configured as a registered output and is assigned to use its Output Clock 1.
It is zero if the IOB is not using Output Clock 1. As with Input Clock 1 and 2, the Output Clocks will vary
depending upon the quadrant of the device in which the IOB resides. In the case of the MSX devices, the
Output Clock 1 and Input Clock 1 for each IOB have the same source, and the Output Clock 2 and Input Clock
2 do as well. RCA[6] will read as a zero at reset.
RCA[7]
RCA[7] is set to a one if the IOB is configured as a registered output and is assigned to use its Output Clock 2.
It is zero if the IOB is not using Output Clock 2. As with Output Clock 1, the source changes depending upon
the quadrant of the device in which the IOB resides. RCA[7] will read as a zero at reset.
RCA[8]
RCA[8] is set to a one if the IOB is configured as a registered output and is assigned to use Next Neighbor
Clocking. It is zero if Next Neighbor Clocking is disabled. Next Neighbor Clocking allows the IOB to be
registered using the next higher numbered Port number signal as its output clock source. Port 100 on the MSX
devices can use the signal from Port 101 for its output clock if this mode is enabled. Port 531’s Next Neighbor
is Port 0. Next Neighbor Clocking will be disabled by default at reset, so RCA[8] will read as a zero.
RCA[9]
RCA[9] is set to a one if the IOB is assigned to use Input Enable 1. It is zero if the IOB is not using Input
Enable 1. All bi-directional IOBs must use one of the dedicated input enable pins (IE_0, IE_1, IE_2, or IE_3)
to enable the IOB to drive data into the crosspoint array. As with the dedicated clock pins, each IOB can access
two input enable signals, which will vary depending upon the quadrant of this chip in which the IOB resides.
RCA[9] will read as a zero at reset.
RCB[0]
RCB[0] is set to a one if the IOB is assigned to use Input Enable 2. It is zero if the IOB is not using Input
Enable 2. RCB[0] will read as a zero at reset.
RCB[1]
RCB[1] is set to a one if the IOB is assigned to use Output Enable 1. It is zero if the IOB is not using Output
Enable 1. All bi-directional IOBs must use one of the dedicated output enable pins (OE_0#, OE_1#, OE_2#, or
OE_3#) to enable the IOB to drive the pin of the device. As with the dedicated clock pins, each IOB can access
two output enable signals, which will vary depending upon the quadrant of the chip in which the IOB resides.
RCB[1] will read as a zero at reset.
RCB[2]
RCB[2] is set to a one if the IOB is assigned to use Output Enable 2. It is zero if the IOB is not using Output
Enable 2. RCB[2] will read as a zero at reset.
RCB[6:3]
RCB[6:3] are reserved.
RCB[7]
RCB[7] is set to a one if the IOB is configured as an inverted output. It is zero if the IOB is not configured as
an inverted output. The output of any IOB may be inverted so long as it is not a registered output or running in
Bus Repeater Mode. RCB[7] will read as a zero at reset.
RCB[8]
RCB[8] is set to a one if the IOB is configured as a registered input and is using an inverted input clock source.
It is zero if it is not using an inverted input clock. Inputs can use any of the three clock sources described above
and may invert that clock if desired. RCB[8] will read as a zero at reset.
RCB[9]
RCB[9] is set to a one if the IOB is configured as a registered output and is using an inverted output clock
source. It is zero if it is not using an inverted output clock. Outputs can use any of the three clock sources
described above and may invert that clock if desired. RCB[9] will read as a zero at reset.
Table 5
I/O Buffer Read Commands (Continued)
Signal
Description
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