Parity Errors and Bus Timeouts
If the J Class Parallel Port DMA controller gets a parity error or bus timeout while mastering a
transaction, the transaction causing the error will be completed normally, but arbitration will be disabled
so no more DMA can be done. The Current Address register will point to the next address to be read after
the error. All of the data in the error transaction will be handshaked to the parallel device and the Current
Count register will have the value indicating the data just read had been processed; this should help in the
debug process.
RS–232 Registers
Table 4–3 shows suggested connector pinouts for the RS–232 interface. Both a nine position male D
connector, such as those used in PC products, and a twenty–five position female D connector, such as
those used in traditional workstations, are shown.
Table 4–3. RS–232 Connector Pinouts
Signal
Direction
9–Pin
25–Pin
Description
Out
3
3
Transmit Data
In
2
2
Receive Data
In
8
5
Clear to send
Out
7
4
Request to send
In
1
8
Data Carrier Detect
In
6
6
Data set ready
In
9
22
Ring Indicator
Out
4
20
Data terminal ready
5
7
Содержание Visualize J200
Страница 75: ... Figure 6 2 Package Tray Bottom View Figure 6 3 Unpacking Pictorial ...
Страница 76: ... 1 1 0 2 1 1 0 2 0 0 3 Figure 6 4 Package Pallet ...
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Страница 83: ... Figure 8 2 French Keyboard ...
Страница 84: ... Figure 8 3 German Keyboard ...
Страница 85: ... Figure 8 4 Italian Keyboard ...
Страница 86: ... Figure 8 5 Japanese Keyboard ...
Страница 87: ... Figure 8 6 Korean Keyboard ...
Страница 88: ... Figure 8 7 Norwegian Keyboard ...
Страница 89: ... Figure 8 8 Spanish Keyboard ...
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Страница 91: ... Figure 8 10 Swiss Keyboard ...
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Страница 93: ...8 13 J Class Technical Reference Keyboard Layouts Figure 8 12 United Kingdom Keyboard ...
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