Digital Interface
3
Digital Interface
3.1
Serial Data Interface
Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual
row header/socket combination at J2. This header/socket provides access to the digital control pins of the
EVM. Consult Samtec at
or 1-800-SAMTEC- 9 for a variety of mating connector options.
describes the J2 serial interface pins.
Table 2. J2: Serial Interface Header
Pin Number
Signal
Description
J2.1
CS
ADC CS signal: controlled by jumper JP1
J2.2
GPIO
ADC PD / Alert signal
J2.3
SCLK
ADC SCLK signal
J2.4
GND
Digital ground
J2.5
SCLK
ADC SCLK signal
J2.7
CS
ADC CS signal: controlled by jumper JP1
J2.9
CS
ADC CS signal: controlled by jumper JP1
J2.10
GND
Digital ground
J2.11
SDI
ADC SDI signal
J2.13
SDO
ADC SDO signal
J2.16
SCL
I
2
C
™
clock line for EEPROM
J2.18
GND
Digital ground
J2.20
SDA
I
2
C data line for EEPROM
4
Power Supplies
J3 is the power-supply input connector.
lists the configuration details for J3.
Table 3. J3: Power-Supply Interface Header
Pin Number
Pin Name
Function
Required
J3.1
+VA
High voltage positive
Yes
analog supply
J3.2
–
VA
High voltage negative
Yes
analog supply
J3.3
+5VA
5-V analog supply
Yes
J3.4
–
5VA
Unused
No
J3.5
GND
Digital ground input
Yes
J3.6
GND
Analog ground input
Yes
J3.7
+1.8VD
1.8-V digital supply
Yes/Optional
J3.8
VD1
Unused
No
J3.9
+3.3VD
3.3-V digital supply
Yes/Optional
J3.10
+5VD
Unused
Yes/Optional
5
SBAU192
–
July 2011
ADS8638EVM-PDK
Copyright
©
2011, Texas Instruments Incorporated
