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LZT 123 7589 R1A
14. USING THE DEVELOPER'S KIT
DCD
Fitted
Connects serial port control signal DCD between
UART connector X4 and radio device.
Note: DCD is a dual function signal from the radio
device. When this signal is being used for any other
purpose (e.g. Keypad or application specific through
X2 or X3), this jumper must be removed.
TD
Fitted
Connects serial port Transmit Data signal TD between
UART connector X4 and radio device.
Note: It is only valid to have one Transmit Data buffer
in the circuit. If TD is driven by the application
through connector X2 or X3, this jumper must be
removed to avoid circuit conflicts.
LED
Fitted
When fitted, this enables the STATUS LED to be
illuminated by signal LED from the radio device.
Note: LED is a dual function signal in the radio
device. When this signal is being used for any other
purpose (e.g. application specific I/O through X2 or
X3), it is recommended that this jumper is removed to
avoid circuit conflicts or unexpected circuit
behavior.
SCL
-
When fitted, connects the I
radio device to the GPIO interface IC, U5.
Note: Use the address selectors A0-A2 to set GPIO
interface I
address is unique to all I
SDA from radio device.
DATA
-
When fitted, connects the I
radio device to the GPIO interface IC, U5.
Note: Use the address selectors A0-A2 to set GPIO
interface I
address is unique to all I
SDA from radio device.
A0
-
When fitted, connects address pin A0 of IC U5 to
logic high. When the jumper is not fitted, address A0
is held to logic low by the DK.
Note: IC U5 address range is 0x70 to 0x7F.
A1
-
When fitted, connects address pin A1 of IC U5 to
logic high. When the jumper is not fitted, address A1
is held to logic low by the DK.
Note: IC U5 address range is 0x70 to 0x7F.
A2
-
When fitted, connects address pin A2 of IC U5 to
logic high. When the jumper is not fitted, address A2
is held to logic low by the DK.
Note: IC U5 address range is 0x70 to 0x7F.
2
C clock signal from the
2
C address. Ensure that the selected
2
C devices using SCL and
2
C data signal from the
2
C address. Ensure that the selected
2
C devices using SCL and
77
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