CP2400/1-DK
Rev. 0.1
23
8.2. AB Board Current Measurement
The header (J2) provides a way to measure the total supply current flowing from the power supply source to the
CP2400/1. The measured current does not include any current from the LED (D1) or the Power LED (D2). See the
target board schematics in Figures 15 through 18 for additional information.
8.3. Port I/O Headers (J1, J3)
Access to the CP2400/1 control interface signals (SMBus or SPI) as well as /RST, /LED, /INT, /CLK, VDD, and
GND is provided through J1 on the AB board. The header J3 provides access to the ground plane for easy clipping
of oscilloscope probes.
8.4. LEDs
Two LEDs are provided on the AB board: one labeled “LED” and one labeled “PWR”. The PWR LED is powered by
VDD being supplied to the CP2400/1. The other LED labeled “LED” is powered through from P1.7 on the
C8051F930 Target Board or P2.7 on the C8051F912 Target Board. Tables 6 and 7 contain more information
regarding which port pins’ control signals are connected to on the target board. Headers are provided on the AB
board to allow for the LEDs to be physically disconnected from the circuit. Placing a jumper on the header J4 will
connect the PWR LED to ground, which will allow it to turn on when a voltage is applied on the CP2400/1’s VDD
pin. Placing a jumper on the header J5 will connect LED labeled LED to the LED signal on the attached Target
Board. Tables 6 and 7 list information on which port pin on the attached Target Board is connected to the LED
signal. The CP2400 LCD Development Board schematic and the CP2401 LCD Development Board schematic
have more information about the LED and control signals.
8.5. Target Board Connections
Tables 6 and 7 list details regarding the port pin connections to the control signals on the CP2400/1.
Table 6. CP2400 Control Signals
Signal
F930 TB
F912 TB
SCK
P1.0
P1.0
MISO
P1.1
P1.1
MOSI
P1.2
P1.2
NSS
P1.3
P1.3
/INT
P0.1
P0.1
/RST
P0.0
P0.0
/CLK
P1.4
P1.4
/LED
P1.7
P2.7
Table 7. CP2401 Control Signals
Signal
F930 TB
F912 TB
SDA
P1.0
P1.0
SCL
P1.1
P1.1
/PWR
P1.3
P1.3
/INT
P0.1
P0.1
/RST
P0.0
P0.0
/CLK
P1.4
P1.4
/LED
P1.7
P2.7
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