V0.1
– May-13
User’s Manual
Page 13 of 18
6.3 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.
J9 (GPIO 0/ I2C_DIO)
J8 (GPIO 1 / I2C_CLK)
Protocol
Baud Rate
Pull high
Pull high
NMEA
4800
Pull high
Pull low
NMEA
9600
Pull low
Pull high
NMEA
38400
Pull low
Pull low
OSP
115200
Remark: Pull high/low =2.2K
Table 4: GPIO 0 and GPIO 1 Settings
Figure 10: Configure the baud rate jumper
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.
