USING THE UNIVERSAL DEVELOPER'S KIT
78
LZT 123 8020 R1A
12.7 Keypad Connector (X410)
A 10 pin connector is provided to connect directly to the Keypad
options when they are selected by the AT command AT*E2IO.
Pin Signal
Description
1
KEYCOL0
Keyboard column 1 (GND)
2 KEYROW1 Data Terminal Ready / Keyboard row 1 / General purpose
i
t 1
3
KEYCOL1
Data Carrier Detect / Keyboard column 1 / General purpose
output 1
4
KEYROW2
General purpose input/output 1 / Keyboard row 2
5
KEYCOL2
Ring Indicator / Keyboard column 2 / General purpose
output 2
6
KEYROW3
General purpose input/output 3 / Keyboard row 3
7
KEYCOL3
General purpose output 5 / Keyboard column 3 / Data Set
Ready
8
KEYROW4
General purpose input/output 4 / Keyboard row 4
9
KEYCOL4
Clear To Send / Keyboard column 4 / General purpose
output 4
10 N/C
Not
connected
Table 14: Keyboard Connector X410
12.8 Flashing Firmware
The developer's board has the hardware circuitry to support
firmware upgrading of several of the module families. Switch
S101 when placed in the FLASH mode allows the module to re-
flashed. Header X102 selects the Voltage used for Re-Flash
DCD
Flash
S101
Normal Operation
FLASH Mode
Normal (VDIG)
FAST (12V)
X102
1-2
2-3
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