Q
How can I determine the revision of a netX 90 chip or a NHXH 90-JTAG evaluation board?
A
The netX 90 chip revision can be distinguished by its datecode. The datecode is printed on the chip package, below the lettering "netX 90". Please refer to the figure 1 below.
The Datecode of final silicon chips consists of 4 digits. The first 2 digits specify the production year, the last 2 digits the calendar week. Example Datecode 1910: Produced in CW 10 of year 2019.
Three netX 90 chip revisions exist:
| No | Name | Datecodes | Description | series product usage |
|---|---|---|---|---|
| 1 | netX 90 MPW | 6420A 7420A | A prototype chip with different functionality and pinout compared to netX 90 Rev. 0 and Rev. 1 | no |
| 2 | netX 90 Rev. 0 | 1830 | Untested final silicon, pilot series, ROMcode has different behaviour than Rev. 1 chip | no |
| 3 | netX 90 Rev. 1 | 1910 | Final silicon product | yes |
Figure 1: NXHX 90-JTAG Rev 3 and Rev 4
Figure 2: NXHX 90-JTAG Rev 1 and Rev 2 - netX 90 MPW: Do not use for development purposes anymore!
See also...