參數(shù)資料
型號： TSC2008IYZGT
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, BGA12
封裝： 2 X 1.50 MM, GREEN, DSBGA-12
文件頁數(shù)： 13/40頁
文件大?。?/td> 1028K
代理商： TSC2008IYZGT
CONTROL BYTE
SBAS406B – JUNE 2008 – REVISED MARCH 2009.......................................................................................................................................................... www.ti.com
The control byte (on SDI), as shown in Table 2, provides the start conversion, addressing, A/D converter
resolution, configuration, and power-down of the TSC2008. Figure 30, Table 2, and Table 3 give detailed
information regarding the order and description of these control bits within the control byte.
Table 2. Order of the Control Bits in the Control Byte
BIT 7
BIT 0
(MSB)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
(LSB)
COMMENT
S
A2
A1
A0
MODE
SER/DFR
PD1
PD0
Excludes setup command
S
0
1
0
Pull-up
Bypass
Timing
Reset
Setup command
Table 3. Description of the Control Bits in the Control Byte
BIT
DESCRIPTION
Start Bit. When this bit = '1', it indicates this is one of the user commands. A new control byte can start every 16th clock cycle in
7
12-bit conversion mode or every 12th clock cycle in 8-bit conversion mode (see Figure 30 through Figure 33).
Bit[6:4] = A[2:0]. Channel select command if A[2:0]
≠
'010'.
These channel select bits, along with the SER/DFR bit,
6-4
Bit[6:4] = A[2:0]. Setup command if A[2:0] = '010'.
control the setting of the multiplexer input, touch driver
switches, and reference inputs (see Table 4 and
Mode Select Bit. This bit controls the number of bits for
Pull-up Resistor Select Bit(1).
the next conversion.
3
0: 50k
PENIRQ pull-up resistor (default).
0: 12 bits (low)
1: 90k
PENIRQ pull-up resistor.
1: 8 bits (high).
Single-Ended/Differential Reference Select Bit
Bypass Noise Filter Bit(1).
(SER/DFR). Along with the channel select bits, A[2:0],
2
0: MAV noise filter enabled (default).
this bit controls the setting of the multiplexer input, touch
1: MAV noise filter bypassed.
driver switches, and reference inputs (see Table 4).
Bit 1: Timing Select Bit(1).
0: TSC2046-compatible timing for SDO during data read (default)
1: Adjusted SDO timing; MSB appears before 1st rising clock edge.
Bit[1:0] = PD[1:0]. Power Down Mode Select Bits.
1-0
See Table 5 for details.
Bit 0: Software Reset Bit.
0: Nothing happens (default).
1: Software reset.
(1)
These bits configure the pull-up resistor value, control the filter bypass, and select the SDO output timing. The bits are static and the
values are stored in register bits that will only be reset to default by a reset condition (power-on reset, software reset, or SureSet) or
changed with the setup command.
20
Copyright 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): TSC2008
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