Pinout and pin description
ST92F124xx/ST92F150Cxx/ST92F150JDV1/ST92F250CV2
VSS. Digital Circuit Ground. Four pins are available on 100-pin versions, two on 64-pin
versions. The pins are internally connected.
VTEST Power Supply Voltage for Flash test purposes. This pin must be kept to 0 in user
mode.
VREG. Stabilization capacitors for the internal voltage regulator. The user must connect
external stabilization capacitors to these pins. Refer to Figure 16.
2.1
I/O port alternate functions
Each pin of the I/O ports of the ST92F124/F150/F250 may assume software programmable
Alternate Functions as shown in Section 4.
2.2
Termination of unused pins
For unused pins, input mode is not recommended. These pins must be kept at a fixed
voltage using the output push pull mode of the I/O or an external pull-up or pull-down
resistor.
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Doc ID 8848 Rev 7