For self-start mode, full power operation will be activated once Vcc applied. No power
saving mode (PTF/MPM/Hibernation) will be supported. While using external
EEPROM or SPI Flash power supervision chip (Maxim, MAX809SEUR+T) is
mandatory in order to prevent any memory corruption if the Vcc removes abruptly.
3.6 Configure the baud rate
Baud rate and protocol selection can be set upon start up through GPIO configura-
tion.A2235-H can be configured to output NMEA at standard baud rates, if
the A2235-H is using the UART host interface.
Table 4 lists the settings for GPIO 0 and GPIO 1 to configure the baud rate at start-up.
After start-up, the GPIOs can be used for other purposes.
Remark: Pull high/low =2.2K
Table 4: GPIO 0 and GPIO 1 Settings
Note: This feature is not available if any MEMS or non-volatile memory devices
are attached to the auxiliary serial bus. The internal software default baud rate
is NMEA 4800 when an EEPROM is connected.
Kommentare zu diesen Handbüchern