Seco COM-Express CCOMe-C79 User Manual page 59

External EEPROM I2C Flash socket
External EEPROM I2C Flash socket
Pin Signal
1 -up +3.3V_ALW
2 -up +3.3V_ALW
3 -up +3.3V_ALW
4 GND
POST Code Display
For debugging purposes, it is available a display made by 4x 7-segment LED display, type Kingbright KCSC02-105 or equivalent.
The management of this display is done using a Lattice LC4064V-75TN44I CPLD, driven through the COM Express
JTAG Connector
JTAG Connector
Pin Signal Pin
1 +3.3V_RUN
2 GND
3 POST_TCK
4 N.C.
CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
CN62
Pin Signal
5 I2C_DAT
6 I2C_CK
7 I2C_Write Protect (GND)
8 +3.3V_ALW
For the programming of CPLD used to manage POST Code Display, it is available a JTAG
CN16
connector CN16, which is a single row, 7 pin, P2.54mm standard pin header, type ADIMPEX
p/n NPE08007-R.
Signal
POST_TCK:
5 POST_TDO
POST_TDO: JTAG Test Data Out Signal
6 POST_TDI
POST_TDI: JTAG Test Data In, +3.3V_RUN
7 POST_TMS
POST_TMS: JTAG Test Mode Select, +3.3V_RUN
The I2C bus coming from COM Express
to Feature pin Header (see par.3.3.8).
It is also used to manage an SO8 EEPROM Socket CN62, type
LOTES p/n ASPI0001-P001A, for plugging I2C Flash in SO-8 format.
The I2C_Write Protect function is disabled for this board (signal tied to GND).
I2C_DAT: General purpose I2C port data I/O line
I2C_CK: General purpose I2C port clock output
™
module is carried directly
™
LPC Bus
to GND
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