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參數(shù)資料
| 型號： | MAX1234ETI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CNTRLR TOUCH 28-TQFN |
| 其它有關(guān)文件： | Automotive Product Guide |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線 |
| 輸入數(shù)/鍵： | 1，4 x 4 小鍵盤 |
| 分辨率（位）： | 8，10，12 b |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 50k |
| 電壓基準(zhǔn)： | 內(nèi)部 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-TQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 包裝： | 管件 |
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MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
18
______________________________________________________________________________________
PENIRQ returns high only after a touch-screen scan is
completed.
PENIRQ does not go low again until one of
the touch-screen data registers is read. Figures 8a and
8b show the timing diagrams for the
PENIRQ pin.
Keypad Interrupt Request (
KEYIRQ)
The
KEYIRQ output can be used to alert the host con-
troller of a key press. The
KEYIRQ output is normally
high and goes low after a key press is detected.
KEYIRQ returns high only after a key-press scan is
completed.
KEYIRQ does not go low again until one of
the key-press data registers is read. Figures 9a and 9b
show the timing diagrams for the
KEYIRQ pin.
Busy Indicator (
BUSY)
BUSY informs the host processor that a scan is in
progress.
BUSY is normally high and goes low and
stays low during each functional operation. The host
controller should wait until
BUSY is high again before
using the serial interface.
Digital Interface
The MAX1233/MAX1234 interface to the host controller
through a standard 3-wire serial interface at up to
10MHz. DIN and
CS are the digital inputs to the
MAX1233/MAX1234. DOUT is the serial data output.
Data is clocked out at the SCLK falling edge and is
high impedance when
CS is high. When performing an
ADC scan,
CS must de-assert high before the end of
the first conversion, otherwise the conversion results
will not be stored.
PENIRQ and KEYIRQ communicate
interrupts from the touch-screen and keypad controllers
to the host processor when a screen touch or a key
press is detected.
BUSY informs the host processor that
a scan is in progress. In addition to these digital I/Os, the
row and column pins of the keypad controller can be
programmed as GPIO pins.
Communications Protocol
The MAX1233/MAX1234 are controlled by reading from
and writing to registers through the 3-wire serial inter-
face. These registers are addressed through a 16-bit
command that is sent prior to the data. The command
is shown in Table 2.
The first 16 bits after the falling edge of
CS contain the
command word. The command word begins with an
R/
W bit, which specifies the direction of data flow on
the serial bus. Bits 14 through 7 are reserved for future
use. Bit 6 specifies the page of memory in which the
desired register is located. The last 6 bits specify the
address of the desired register. The next 16 bits of data
are read from or written to the address specified in the
command word. After 32 clock cycles, the interface
automatically increments its address pointer and con-
tinues reading or writing until the rising edge of
CS, or
until it reaches the end of the page.
DATA
READ
DOUT
TOUCH-
SCREEN
DATA
R_
KEYIRQ
BUSY
CS
Figure 9a. Timing Diagram for Key-Press-Initiated Debounce
Scan
R_
DOUT
DATA
READ
TOUCH-
SCREEN
DATA
DIN
KEYIRQ
BUSY
CS
Figure 9b. Timing Diagram for Host-Initiated Keypad
Debounce Scan
BIT15
MSB
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
LSB
R/
W
RES
PAGE
ADD5
ADD4
ADD3
ADD2
ADD1
ADD0
Table 2. Command Word Format
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1234ETI+ | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4Ch uWire QSPI/SPI Touch Interface RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| MAX1234ETI+T | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4Ch uWire QSPI/SPI Touch Interface RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| MAX1234EVC16 | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX1233/34 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX1234EVKIT | 制造商:Maxim Integrated Products 功能描述:+15KV ESD-PROTECTED TOUCH-SCREEN CO - Rail/Tube |
| MAX1236EUA | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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