Datasheet

ADS7950, ADS7951, ADS7952, ADS7953
ADS7954, ADS7955, ADS7956, ADS7957
ADS7958, ADS7959, ADS7960, ADS7961
www.ti.com SLAS605A –JUNE 2008–REVISED JANUARY 2010
Table 2. Mode Control Register Settings for Auto-1 Mode
DESCRIPTION
RESET
BITS
LOGIC
STATE
FUNCTION
STATE
DI15-12 0001 0010 Selects Auto-1 Mode
DI11 0 1 Enables programming of bits DI10-00.
0 Device retains values of DI10-00 from previous frame.
DI10 0 1 The channel counter is reset to the lowest programmed channel in the Auto-1 Program Register
0 The channel counter increments every conversion (No reset)
DI09-07 000 xxx Do not care
DI06 0 0 Selects 2.5V i/p range (Range 1)
1 Selects 5V i/p range (Range 2)
DI05 0 0 Device normal operation (no powerdown)
1 Device powers down on the 16th SCLK falling edge
DI04 0 SDO outputs current channel address of the channel on DO15..12 followed by 12-bit conversion
0
result on DO11..00.
1 GPIO3-GPIO0 data (both input and output) is mapped onto DO15-DO12 in the order shown below.
Lower data bits DO11-DO00 represent 12-bit conversion result of the current channel.
DO15 DO14 DO13 DO12
GPIO3
(1)
GPIO2
(1)
GPIO1
(1)
GPIO0
(1)
DI03-00 0000 GPIO data for the channels configured as output. Device will ignore the data for the channel which is configured
as input. SDI bit and corresponding GPIO information is given below
DI03 DI02 DI01 DI00
GPIO3
(2)
GPIO2
(2)
GPIO1
(2)
GPIO0
(2)
(1) GPIO 1 to 3 are available only in TSSOP packaged devices. QFN device offers GPIO 0 only.
(2) GPIO 1 to 3 are available only in TSSOP packaged devices. QFN device offers GPIO 0 only.
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Product Folder Link(s): ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958,
ADS7959, ADS7960, ADS7961