ZICM2410-EVB3 Hardware Reference Guide
Rev C
Document No. 0007-05-08-03-001
Page 15 of 19
4.6 PUSHBUTTON
SWITCHES
Figure 7 – Photo, Pushbutton Switches
When a pushbutton switch is pressed, the corresponding GPIO is pulled low. When released
(or not pressed), the GPIO is pulled high. The pushbutton switches correspond to the GPIOs as
listed in Table 11. Switch #3 and #4 are dual purpose, as they can also be used as the External
Interrupts (INT0 and INT1) inputs for the embedded processor.
Table 11 – Pushbutton Switch Connections
SWITCH #
GPIO
SWITCH #
GPIO
1 Port
1[3]
3 Port
3[2]
2 Port
1[4]
4 Port
3[3]
4.7 EXTERNAL
MEMORY
To store non-volatile data, the
ZICM2410-EVB3
provides an on-board external SPI Flash
memory connected to the Serial Peripheral Interface (SPI) of the
ZIC2410
. The external
memory is required when performing Over-the-Air programming. Using the isolation DIP
switches, the memory can be easily disconnected from the
ZIC2410
. Figure 8 details the
connection details below.
Figure 8 – Drawing, External Memory Circuit
4.8 VOICE
CODEC
The
ZICM2410-EVB3
has an on-board mono CODEC with speaker driver to support wireless
audio and voice. The primary purpose of the external chip is to perform the analog-to-digital
and digital-to-analog conversions. The CODEC is configured using the SPI interface while the
audio / voice data uses the
ZIC2410
’s I2S interface.
4.9 HEADPHONE / MICROPHONE JACKS
The
ZICM2410-EVB3
is equipped with two 3.5 mm jacks, one for headphones and one for a
microphone input. The evaluation board has been optimized for headphones with 32
Ω
