Board Components
16
Connector
Pin Number
Connector
Signal Name
Number
J6-1 EXT
K
_CL
98
1-11
I2C Serial EEPROM
This section describes the I2C Serial EEPROM on the THDB-H2S board
The THDB-H2S board provides an EEPROM (U8) which can be configured by the I2C interface. The size of
the EEPROM is 128 bit that can store the board information or user’s data. The detailed pin description
between EEPROM and HSMC connector is listed in the Table 3.9.
Table 3.9 The pin assignments of the I2C serial EEPROM
EEPROM
Pin Number
EPPROM
Signal Name
HSMC Pin
Number
U8-5 HSMC_SDA
33
U8-6 HSMC_SC
L
34
1-12
Power Supply
This section describes the power supply on the THDB-H2S board
The power distribution on the THDB-H2S board is shown in Figure 3.9.
VCC33
(3.3 V)
2.5V
3.3V
1
2
3
12V
3.3V
1
2
3
5V
REG1
REG2
HSMC
Connector
J1
Santa
Cruz
Connector
J3~J5
3-pin Header
J8
3-pin Header
J9
Regulator
Regulator
VHSMC
VSC
Level
Translators
(U1 ~ U6)
VCCA
VCCB
Mictor
Connnetor
Push
Buttons
EEPROM
RS232
Tranceiver
Figure 3.9 THDB-H2S board power distribution diagram.
