Reference Manual

65 ConnectCore 9M 2443 & Wi-9M 2443 Hardware Reference
Chapter 2
3.3VDC power
controller - VLIO
 The ConnectCore 9M 2443 module supports another external power source:
VLIO. This power source normally comes from a battery and is used in Mobile
application for generating the S3C2443 core voltage. On the ConnectCore 9M
2443 development board, VLIO is selectable by jumper setting onboard
+3.3VDC, or external VLIO.
Power LEDs
 Two power LEDs are available on the development board, and indicate:
– presence of 9-30VDC power supply,
– presence of +5V, or
– presence of 3.3VDC power supply.
 All power LEDs are red.
Coin cell for RTC
 A 3.0V coin cell should be used on the ConnectCore 9M 2443 development
board for powering the RTC unit on the module.
Current
measuring option
 Measuring the current on the development board allows evaluation of power
needed for various board designs.
 A current measuring option is implemented by adding a weak resistor in a
series with the power supply that needs to be measured.
 Current measurement values might be performed for 3.3VDC, VLIO and VRTC.
 Coin cell battery voltage can also be monitored by adding a jumper between
the coincell and the VRTC power supply on the ConnectCore 9M 2443 module.
Reset  A push-button allows manual reset by connecting RSTIN# to ground. The reset
controller is located on the ConnectCore 9M 2443 module.
JTAG interface
 The module JTAG interface is supported through a 20-pin Multi-ICE JTAG
connector, which is located on the ConnectCore 9M 2443 development board.
 This connector supports RTCK signal (optional).
 TRST# signal has a 2.2K pull-down resistor on module. This means a debugger
with push-pull output at TRST# is needed and open drain is not working.
I²C interface
 The ConnectCore 9M 2443 module provides access to one I²C channel. 4k7 pull-
ups resistors are used on the module for these signals.
 I²C signals are accessible on the 1:1 expansion connectors and on the
dedicated I²C header.
PoE connectors
 The POE connectors support the PoE Application Module.