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Design Guidelines

Requirements

  • The socket notch faces outside the board.
  • Mounting holes are on 5×5 mm grid.
  • Must be able to signal the mainboard on the IRQ/GPIO pin (socket pin #3)
  • Module must use no more than 60 mA during startup, and must be able to run at 60 mA indefinitely (modules will be able to request more power, but these requests may be denied)

For STM8S-based modules:

  • 0.1uF decoupling capacitor on Vdd, located near the microcontroller's power input pins
  • At least one or two additional 1.0uF decoupling capacitors (not explicitly required, but recommended)
  • 1.0uF capacitor connected between Vcap and ground
  • 0.1uF capacitor connected between NRST and ground
  • GO! Bus pin 4 should be connected to STM8S SWIM pin
  • GO! Bus pin 5 should be connected to STM8S NRST pin

For more details on power supply connections and PCB layout recommendations see AN2860 - EMC guidelines for STM8 microcontrollers.

Recommendations

  • The socket shrouding is 1.5 mm away from the edge.
  • Mounting holes should be 3.0 mm (tight fit) or 3.2 mm (loose fit) in diameter.

GO! Bus

TBD.

See Also


GO! Socket

Pinout

  1. 3V3
  2. 5V
  3. GPIO+/IRQ
  4. UART_RX (from module's perspective)
  5. UART_TX (from module's perspective)
  6. SPI_SS
  7. SPI_MOSI
  8. SPI_MISO
  9. SPI_SCK
  10. GND

Prototyping


See Also


Electronic Parts

GroupNumberDescriptionDigi-KeyMouser
Socket20021521-00010T1LFFCI Minitek127® 1.27×1.27 mm IDC Header Vertical, SMD609-4054-ND649-200215210010T1LF
Socket20021511-00010T1LFFCI Minitek127® 1.27×1.27 mm IDC Header Vertical, TH649-200215110010T1LF
Socket20021444-00010T1LFFCI Minitek127® 1.27×1.27 mm IDC Receptacle609-4055-ND649-200214440001T1LF
MCUSTM8S003F38-bit@16 MHz, 8K Flash (rated at 100 cycles!), 1K RAM, TSSOP20497-11946-5-ND511-STM8S003F3P6
MCUSTM8S103F38-bit@16 MHz, 8K Flash (10k cycles), 1K RAM, TSSOP20511-STM8S103F3P6
PassiveGRM155R61A104KA01D0402 CAP CER X5R 100nF 10V 10%490-1318-2-ND81-GRM155R61A104KA01
PassiveGRM155R60J105KE19D0402 CAP CER X5R 1µF 6.3V 10% (STM8 VCAP)490-1320-2-ND81-GRM155R60J105KE19

See Also



Software

TBD.

See also

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