參數(shù)資料
型號(hào)： QT60161B
廠商： Electronic Theatre Controls, Inc.
英文描述： 16 KEY QMATRIX KEYPANEL SENSOR IC
中文描述： 16個(gè)主要QMATRIX KEYPANEL傳感器IC
文件頁數(shù)： 13/36頁
文件大?。?/td> 683K
代理商： QT60161B
See Section 3.15, page 10, for a description of the Alert pin
which can be used to reduce communication traffic.
4.4 SPI Master-Slave Mode
Refer to Figures 4-1, 4-2, and 4-4. In Master-Slave mode the
host and the sensor take turns being Master, with the host
always leading off in Master mode during an exchange. The
current Master always controls all 3 signal lines. The sensor
takes a variable amount of time to respond to the host,
depending on the nature of the function and its current and
pending tasks. The host, like the sensor, must idle in slave
mode when not sending a command.
Master/Slave requires 3 signals to operate
:
MOSI
- Master out / Slave in data pin - bidirectional - an input
pin while the host is transmitting data; an output when the
sensor is transmitting data. The MOSI of the host and
slave should be tied together. The MISO lines are not used
on either part and should be left open.
SCK
- SPI clock - bidirectional - an input pin when receiving
data; an output pin when sending. The host must shift out
data on the falling edge of SCK; the QT60161B clocks data
in on the rising edge of SCK.
Important note:
SCK from
the host must be low before asserting SS
’
low or high at
either end of a byte or the transmission will fail. SCK
should idle low; if in doubt, a 10K pulldown resistor should
be used. When the sensor returns data it becomes the
Master; data is shifted out by it on the falling edge of SCK
and should be clocked in by the host on the rising edge.
SS
’
- Slave select - bidirectional framing control. When the
sensor is in slave mode, this pin accepts the SS
’
control
signal from the host. In either data direction, SS' must go
low before and any during data transfer; it should not go
high again until SCK has returned low at the end of a byte.
In Master mode the sensor asserts control over this line, to
make the host a slave and to frame the data. This line
must idle high; the part includes an internal pullup resistor
and should be floated during idle times.
Internal pullup resistor note:
The internal pullup resistor on
SS
’
can range from 35k to 120k ohms. If RC filtering is used
on the SPI lines per Figure 4-7, this pullup resistance may not
be low enough to ensure adequate signal risetime and may
need to be augmented with external 10k pullups.
A command may consist of one or two bytes with a
m
50us
delay between command bytes. At the end of a full command,
the Master must go into Slave mode to await a response from
the sensor.
The sensor may take some time to process the host
command and respond. When it does so, it asserts SS
’
low
and begins clocking its data. For multi-byte responses, the
bytes will be sent at intervals which may be somewhat
irregular depending on the request and the processing
load of the sensor. The host must be prepared to accept
the sensor data as it comes or there can be a data
overrun in the host.
If the data returns too fast for the host
to accept it, the SPI clock rate should be lowered.
A typical Master-Slave function sequence is as follows
:
1) Host enters Master mode. The sensor is already in
Slave mode.
2) The host pulls SS
’
low, then transfers one byte of
command to the sensor via MOSI, then releases SS
’
to
float high again.
3) For 2-byte functions, (2) is repeated with
m
50us spacings
between bytes.
4) The host immediately places its SPI port into Slave mode,
floating SCK and MOSI
’
; SS
’
stays floating.
5) When the sensor has a command echo or data to send
back, it puts its SPI register in Master mode, taking control
over MOSI and SCK. SS' remains floating.
6) The sensor pulls SS
’
low, then clocks out its response
byte to the host, then floats SS
’
high again.
7) The sensor repeats (6) as necessary for multiple byte
responses.
8) The sensor returns to slave mode.
After the transmission sequence, the SPI lines float high or
are left to float in an indeterminate state (MOSI) until the next
transmission sequence is initiated by the host. The host
should wait for
>
1ms after a sequence before initiating
another transmission sequence.
See Section 3.15, page 10, for a description of the Alert pin
which can be used to reduce communication traffic.
Quantum Research Group Ltd.
l
Q
13
www.qprox.com QT60161B / R1.03
Figure 4-2 SPI Connections
Slave-Only
Master-Slave
MOSI
SS
MOSI
MISO
MISO
SCK
SCK
DRDY
SS
P_OUT
P_IN
Host MCU
QT60xx5
Vdd
SS
MOSI
MOSI
SCK
SCK
DRDY
SS
Host MCU
QT60xx5
MISO
MISO
Figure 4-1 Communications Option Jumpers
X0
X1
Vcc
Opt A
Opt B
To Matrix
10K
10K
L H
H L
13
14
Parallel
High
High
SPI, Master/Slave
Low
High
UART
High
Low
SPI, Slave only
Low
Low
Interface Type
X0OPB (Pin 14)
X0OPA (Pin 13)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
QT60161B-A 制造商:QUANTUM 制造商全稱:QUANTUM 功能描述:16 KEY QMATRIX KEYPANEL SENSOR IC
QT60161B-AS 功能描述:SENSOR IC MTRX TOUCH16KEY 44TQFP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:QMatrix™ 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
QT60161B-ASG 功能描述:IC SENSOR MTRX TOUCH 16CH 44TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:QMatrix™ 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
QT60161B-ASG-SL739 功能描述:電容觸摸傳感器 Qtouch IC RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
QT60161-S 制造商:QUANTUM 制造商全稱:QUANTUM 功能描述:16 KEY QMatrix KEYPANEL SENSORS IC
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