Texas Instruments ADS1 7 EVM-PDK Series User Manual page 11

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5 ADS1278EVM Hardware Details
The ADS1278EVM is designed to easily interface with multiple control platforms. Dual-row, header/socket
combinations at J3, J4, and J5 allow connection to external circuitry for evaluation and debug.
5.1 Jumpers and Switches
Jumpers and Switches function shown in table below
Jumper/Switch Functions
J1 FSYNC/DRDY Source
J2 FSYNC/DRDY Source
J3 Analog Input Buffers Powerdown
J4 Hardware/Software Control of Clock Source
Internal/External Clock Select (Hardware
J5
control)
GPIO2
GPIO3
GPIO4
S1
CLKDIV
GPIO0
GPIO1
Powerdown Channel 1
Powerdown Channel 2
Powerdown Channel 3
Powerdown Channel 4
S2
Powerdown Channel 5
Powerdown Channel 6
Powerdown Channel 7
Powerdown Channel 8
S3 Converter Reference source selector
S4 Channel 4 Input source selector
S5 Channel 3 Input source selector
(1)
Only one of FSYNC/DRDY signals should be connected at a time (J1 or J2).
(2)
Channels 4-8 only available for ADS1278 and ADS1178.
SBAU197 – February 2012
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Table 5. Jumper and Switch Descriptions
Descriptions
Short to select FSR as the source
Short to select FSX as the source
Short - input buffers powered down
Open - input buffers powered up
Short - Software control
Open - Hardware control
Short - External clock source selected
Open - Internal clock source selected
Hardware control for GPIO2 (set to OFF position for use with
software)
Hardware control for GPIO3 (set to OFF position for use with
software)
Hardware control for GPIO4 (set to OFF position for use with
software)
Hardware control for CLKDIV (set to OFF position for use with
software)
Hardware control for GPIO0 (set to OFF position for use with
software)
Hardware control for GPIO1 (set to OFF position for use with
software)
Hardware control for PWDN1 (set to OFF position for use with
software)
Hardware control for PWDN2 (set to OFF position for use with
software)
Hardware control for PWDN3 (set to OFF position for use with
software)
Hardware control for PWDN4 (set to OFF position for use with
software)
Hardware control for PWDN5 (set to OFF position for use with
(2)
software)
Hardware control for PWDN6 (set to OFF position for use with
(2)
software)
Hardware control for PWDN7 (set to OFF position for use with
(2)
software)
Hardware control for PWDN8 (set to OFF position for use with
(2)
software)
Selects source for reference - buffered on-board ref or header
(external)
Selects Channel 4 input source - header or input buffer
Left - header
Right - input buffer
Selects Channel 3 input source - header or input buffer
Left - header
Right - input buffer
Copyright © 2012, Texas Instruments Incorporated
ADS1278EVM Hardware Details
(1)
(1)
ADS1x7xEVM-PDK
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