EVK-ANNA-B112 - User Guide
UBX-18018539 - R01
Product description
Page 17 of 29
1.9
Buttons and LEDs
Figure 15: Position of the push-buttons and LEDs on the evaluation board
Annotation
Function
Description
SW0
Reset button
Connected directly to the ANNA RESET_N pin.
SW1
User button
Push button for application use. Connected directly to the ANNA SWITCH_1
(IO_30) pin
SW2
User button
Push button for application use. Connected directly to the ANNA SWITCH_2
(IO_38) pin
Table 11: EVK-ANNA-B112 buttons
Annotation Function
Description
Color
DS1
UART CTS LED
Connected to the ANNA UART_CTS (IO_35) pin via jumper header J9
DS2
UART RTS LED
Connected to the ANNA UART_RTS (IO_34) pin via jumper header J9
DS3
Interface MCU LED
Blinks on USB enumeration and activity, lit when the Interface MCU is
connected via USB
DS4
Interface MCU LED
Error LED
DS5
UART DTR LED
Connected to the ANNA UART_DTR (IO_25) pin via jumper header J9
DS6
UART DSR LED
Connected to the ANNA UART_DSR (IO_26) pin via jumper header J9
DS7
UART RXD LED
Connected to the ANNA UART_RXD (IO_20 pin via jumper header J9
DS8
UART TXD LED
Connected to the ANNA UART_TXD (IO_19) pin via jumper header J9
DS9
RGB LED
Connected to the ANNA RED (IO_29), GREEN (IO_30) and BLUE (IO_31)
pins via jumper header J19
Table 12: EVK-ANNA-B112 LED indicators
1.10
Disconnecting ANNA signals from board peripherals
All evaluation board peripherals, such as level shifters, LEDs, and the interface MCU will be
connected to the ANNA-B112 module by default. This might not suit all evaluation scenarios. All
peripherals can be switched off by disconnecting their power supplies (see section 1.6), but if only
specific signals have to be isolated, it will require finer control.
All the ANNA module signals that are connected to board peripherals have thus been routed via
jumper headers, so that jumpers can be pulled or added as needed by the evaluation board user,
isolating, or connecting specific signals. Figure 16 shows the layout of these jumper headers.
