General Changing
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netX 50 to netX 51/52 | Migration Guide
DOC120109MG05EN | Revision 5 | English | 2013-08 | Released | Public
2012-2013
4.5
Activating 256 KByte as Dual-Port Memory and Detection
of netX 51 or netX 52 Mode
A chip can be roughly divided into 2 components: the integrated circuit die (this is the little silicon
piece) and the surrounding package. The package includes the plastic housing and the connection
from the die to the outer pins. This is the pinning. It determines which signals from the die are
routed to a pin on the surface of the package. Note that not all signals from the die must be
connected to a pin. A pinning can leave some of the signals unconnected. The netX 51 and
netX 52 share the same die, but the netX 52 have less bond wires and less pins to the pins to fit in
a smaller housing and reduce the component costs.
For netX 51 and netX 52 the firmware must be updated in any case!
The netX 51 provides all signals from the die. The pinning is identical to the netX 50 and the chip
can be placed instead of a netX 50 on the PCB.
For some special application it is necessary to enlarge the size of the Dual-Port Memory up to 256
KByte. One Power pad and one Ground pad of the netX 50 is used as additional address lines
DPM_A16 and DPM_A17. For safety reason this has to be activated by a pull up resistor of
10 kOhm at MEM_A18 or MEM_A19 according the following table:
MEM_A18 = 10 kOhm to activate DPM_16 and DPM_A17 in netX 51 designs
MEM_A19 = 10 kOhm to activate DPM_16 and DPM_A17 in netX 52 designs
These two bits can be read out of Bit 10 and Bit 11 of the netX Version register to determine if the
netX is running as netX 51 or netX 52 designs. In case of netX 52 mode the USB Device ID
changes from 0x18 to 0x19.
