參數(shù)資料
型號： THS10064IDA
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 4-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32
封裝： GREEN, PLASTIC, TSSOP-32
文件頁數(shù)： 19/42頁
文件大小： 527K
代理商： THS10064IDA
THS10064
SLAS255B – DECEMBER 1999 – REVISED DECEMBER 2002
www.ti.com
26
Control Register 1, Write Only (see Table 8)
RA1
RA0
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0
1
RESERVED
OFFSET
BIN/2s
R/W
DATA_P
DATA_T
TRIG1
TRIG0
OVFL/FRST
RESET
Table 12. Control Register 1 Bit Functions
BITS
RESET
VALUE
NAME
FUNCTION
0
RESET
Reset
Writing a 1 into this bit resets the device and sets the control register 0 and control register 1 to the reset values.
In addition the FIFO pointer and offset register is reset. After reset, it takes 5 clock cycles until the first value is
converted and written into the FIFO.
1
0
FRST
FRST: FIFO reset
By writing a 1 into this bit, the FIFO is reset.
2, 3
0,0
TRIG0,
TRIG1
FIFO trigger level
Bit 2 and bit 3 of control register 1 are used to set the trigger level for the FIFO. If the trigger level is reached, the
signal DATA_AV (data available) becomes active according to the settings of DATA_T and DATA_P. This
indicates to the processor that the ADC values can be read. Refer to Table 13.
4
1
DATA_T
DATA_AV type
Bit 4 of control register 1 controls whether the DATA_AV signal is a pulse or static (e.g for edge or level sensitive
interrupt inputs). If it is set to 0, the DATA_AV signal is static. If it is set to 1, the DATA_AV signal is a pulse. Refer
to Table 14.
5
1
DATA_P
DATA_AV polarity
Bit 5 of control register 1 controls the polarity of DATA_AV. If it is set to 1, DATA_AV is active high. If it is set to 0,
DATA_AV is active low. Refer to Table 14.
6
0
R/W
R/W, RD/WR selection
Bit 6 of control register 1 controls the function of the inputs RD and WR. When bit 6 in control register 1 is set to
1, WR becomes a R/W input and RD is disabled. From now on a read is signalled with R/W high and a write with
R/W as a low signal. If bit 6 in control register 1 is set to 0, the input RD becomes a read input and the input WR
becomes a write input.
7
0
BIN/2s
Complement select
If bit 7 of control register 1 is set to 0, the output value of the ADC is in twos complement. If bit 7 of
control register 1 is set to 1, the output value of the ADC is in binary format. Refer to Table 3 through Table 6.
8
0
OFFSET
Offset cancellation mode
Bit 8 = 0
→ normal conversion mode
Bit 8 = 1
→ offset calibration mode
If a 1 is written into bit 8 of control register 1, the device internally sets the inputs to zero and does a conver-
sion. The conversion result is stored in an offset register and subtracted from all conversions in order to
reduce the offset error.
9
0
RESERVED
Always write 0.
FIFO TRIGGER LEVEL
Bit 2 and bit 3 (TRIG1, TRIG0) of control register 1 are used to set the trigger level of the FIFO (see Table 13). If the
trigger level is reached, the DATA_AV (data available) signal becomes active according to the setting of the signal
DATA_AV to indicate to the processor that the ADC values can be read.
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