Casio PX-330 User Manual
Page 32
32
16.3.13
data : Parameter Data
Parameter data indicates the parameter value.
The data array size is len + 1. For a one data item structure, the length depends on the data bit width, as shown below.
Each block of data is packed from the lowest order byte first. In the case of multiple-byte data, the lowest weighted bit
is the LSB of the first “data” block, and the highest weighted bit is the MSB of the final “data” block.
The following shows an example of how data would be divided for transfer in the case of 32-bit data.
Single Message Size Limit
With the Instrument’s system exclusive message format, the size of a single message cannot exceed 48 bytes.
The data size and the array size, however, can cause a packet to exceed 48 bytes when transferring a single parameter array.
In this case, the IPS and IPR message data length and data index number values can be modified to enable division of a
single parameter value into multiple messages so it can be sent that way.
16.3.14
EOX : End of System Exclusive Message
This is the End of System Exclusive Message status byte established by the MIDI standard.
Format:
index0
0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)
index1
0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)
index2
0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)
:
:
indexN
0dddddddB (0eeeeeeeB) (0fffffffB) (0gggggggB) (0hhhhhhhB)
dddddB + 1
Number of data
1 - 7
1
8 - 14
2
15 - 21
3
22 - 28
4
29 - 32
5
7
6
5
4
3
2
1
0
data0:
0
[bit06]
[bit05]
[bit04]
[bit03]
[bit02]
[bit01]
[bit00]
data1:
0
[bit13]
[bit12]
[bit11]
[bit10]
[bit09]
[bit08]
[bit07]
data2:
0
[bit20]
[bit19]
[bit18]
[bit17]
[bit16]
[bit15]
[bit14]
data3:
0
[bit27]
[bit26]
[bit25]
[bit24]
[bit23]
[bit22]
[bit21]
data4:
0
0
0
0
[bit31]
[bit30]
[bit29]
[bit28]
Format: 11110111B