ADLINK CM1-86DX2 - Manual (Page 46)

40 Module Description
3.13 BMC Service Connector (X24)
This connector is only needed in case of updates of the BMC. For further information, please
contact our support team. In most cases this connector is not needed by the user and is
intended for production testing.
X24 offers the opportunity to connect I2C devices to the CM1-86DX2.
3.14 JTAG (X16)
The CM1-86DX2 makes the JTAG port of the SoC accessible to the user. This JTAG is only sup-
ported through DMP’s own JTAG tools.
Currently, only BIOS recovery is possible through DMP’s JTAG tools.
The JTAG port of the Vortex86DX2 is an SIL8, 2.0 mm header located next to the power con-
nector.
3.15 User GPIO (X17) and Analog-In (X21)
The CM1-86DX2 offers one configurable I/O-port with 8 5V tolerant IOs on connector X17 and
8 single-ended analog inputs with 10-bit effective resolution and a sample rate of
100 kSamples/s on connector X21. These analog inputs tolerate a maximum input voltage of
3.6V, while the reference voltage is 3.3V.
This reference voltage is accessible through the X21 connector.
Features of the integrated ADC
 Resolution: 11 bit (10 bit effective)
 Integral Nonlinearity (INL): ±2 LSB
 Differential Nonlinearity (DNL): ±1 LSB
 Input Capacitance (typ.): 102.4 pF
 Input Clock Frequency (max.): 1.6 MHz
 Sample Frequency (max.): 100 kHz
 Signal to Noise Ratio plus Distortion Ratio (max.) (@f
IN
=50 kHz): 61.96 dB
 ADC channel 7 is shared with the integrated temperature sensor of the SoC
Table 3-24: BMC Service Connector (X24)
Pin I2C0, X24 (3.3 V)
6 SCL
7 SDA
10 GND
If you are using I2C in your own application and want to use SEMA at the same time,
make sure not to override current data transfers from either SEMA or the user application
on the bus. This can lead to application failures.