DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released
DSB75_hd_v12
Page 47 of 96
2008-08-26
Table 18: Pin assignment of the I²C interface X511
X511
pin
Name
I/O
Description
X100 signal
name
Config.
switches
Remark
1 I2C_CLK_5V
O
Clock,
(5V logic)
I2CCLK S500:3
EEPROM
accessible
External pull-up
resistor 3k3
recommended
2 I2C_CLK_3V
O
Clock,
(3V logic)
I2CCLK S500:1
External
pull-up
resistor
≥
750R
required
3 I2C_DAT_5V
I/O
Data,
(5V logic)
I2CDAT S501:3
EEPROM
accessible
External pull-up
resistor 3k3
recommended
4 I2C_DAT_3V
I/O
Data,
(3V logic)
ISCDAT S501:1
External
pull-up
resistor
≥
750R
required
5 n.c.
6 n.c.
7 5V0
O
5V0
supply
voltage
ON when DSB75
is supplied
8 GND
Ground
9 VDD
O
2.9V
supply
voltage
ON when GSM
module is active
10 GND
Ground