
MSX Family Data Sheet
I-Cube, Inc.
[Rev. 1.10] 9/5/01
13
The RC interface specifies that the RCI signals be used to determine the type of operation being
performed.
1.4.2
Read and Reset Commands
When RCI[1:0] are equal to 11 a Read or Reset command is executed (see
Table 4: Reset
Commands).
1.4.2.1
Reset Commands
RCC[0], RCB[9:0], and RCA[9:0] have no function during a reset command and must be written
as zeroes.
Table 3
RapidConfigure Input
RCI[1:0]
Description
00
Force Testing Command. Force commands can force a port to drive either a one or a zero to either the pad or
crosspoint array. These commands are generally only used for diagnostic testing.
01
I/O Buffer Programming Command. These commands are used to configure a port as an input or output,
registered or not, etc.
10
Crosspoint Array Programming Command. Crosspoint connections can be made or broken, or an individual
port can be reset.
11
Read and Reset Commands. This setting is used to read back configuration data from an IOB or crosspoint
connection information. It can also be used to reset all of the IOBs and the crosspoint array.
Table 4
Reset Commands
RCC[2:1]
Description
00
Reserved. This is not a valid command.
01
Reserved. This is not a valid command.
10
Crosspoint Array Reset. This command will reset the entire crosspoint array, breaking any previously
existing connections.
11
Crosspoint Array and IOB Reset. This command resets both the IOBs and the crosspoint array as described
above.
1
0
1
0
RCI[1:0]
RCC[3:0]
RCB[9:0]
RCA[9:0]
Reset Cmd Options
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
0
1
Reset Command
Read/Reset Cmd
0