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參數(shù)資料
| 型號： | SX1508IULTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 6/41頁 |
| 文件大小： | 0K |
| 描述： | IC GPIO EXPANDER I2C 8CH 20QFN |
| 特色產(chǎn)品： | SX1508/SX1509 GPIO Expanders |
| 標準包裝： | 1 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 400kHz |
| 電源電壓： | 1.2 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-UFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 20-QFN-UT（3x3） |
| 包裝： | 標準包裝 |
| 包括： | LED 驅(qū)動器 / 小鍵盤引擎 |
| 其它名稱： | SX1508IULDKR |
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ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
th Oct. 2009
14
www.semtech.com
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
3.
In operation, the SX1507, SX1508 and SX1509 may be reset (POR like or LED driver counters only
depending on RegMisc setting) at anytime by an external device driving NRESET low during tPULSE.
Chip can be accessed normally again after NRESET rising edge.
4.
During a brown-out event, if VDDM drops above VDROPH a reset will not occur.
5.
During a brown-out event, if VDDM drops between VDROPH and VDROPL a reset may occur.
6.
During a brown-out event, if VDDM drops below VDROPL a reset will occur next time VPOR is crossed.
Please note that a brown-out event is defined as a transient event on VDDM. If VDDM is attached to a battery,
then the gradual decay of the battery voltage will not be interpreted as a brown-out event.
Please also note that a sharp rise in VDDM (> 1V/us) may induce a circuit reset.
4.4.2
Software (RegReset)
Writing consecutively 0x12 and 0x34 to RegReset register will reset all registers to their default values.
4.5
2-Wire Interface (I
2C)
The SX1507, SX1508 and SX1509 2-wire interface operates only in slave mode. In this configuration, the device
has one or 4 possible devices addresses defined by ADDR[1:0] pins:
Device
ADDR[1:0]
Address
Description
00
0x20 (0100000)
First address of the 2-wire interface
01
0x21 (0100001)
Second address of the 2-wire interface
10
0x22 (0100010)
Third address of the 2-wire interface
SX1508
11
0x23 (0100011)
Fourth address of the 2-wire interface
00
0x3E (0111110)
First address of the 2-wire interface
01
0x3F (0111111)
Second address of the 2-wire interface
10
0x70 (1110000)
Third address of the 2-wire interface
SX1507 &
SX1509
11
0x71 (1110001)
Fourth address of the 2-wire interface
Table 7 - 2-Wire Interface Address
2 lines are used to exchange data between an external master host and the slave device:
SCL : Serial CLock
SDA : Serial DAta
The SX1507, SX1508 and SX1509 are read-write slave-mode I
2C devices and comply with the Philips I2C
standard Version 2.1 dated January, 2000. The SX1507, SX1508 and SX1509 have a few user-accessible
internal 8-bits registers to set the various parameters of operation (Cf. §5 for detailed configuration registers
description). The I
2C interface has been designed for program flexibility, in that once the slave address has been
sent to the SX1507, SX1508 or SX1509 enabling it to be a slave transmitter/receiver, any register can be written
or read independently of each other. The start and stop commands frame the data-packet and the repeat start
condition is allowed if necessary.
Seven bit addressing is used and ten bit addressing is not allowed. Any general call address will be ignored by
the SX1507, SX1508 and SX1509. The SX1507, SX1508 and SX1509 are not CBUS compatible and can
operate in standard mode (100kbit/s) or fast mode (400kbit/s).
4.5.1
WRITE
After the start condition [S], the slave address (SA) is sent, followed by an eighth bit (‘0’) indicating a Write. The
slave then Acknowledges [A] that it is being addressed, and the Master sends an 8 bit Data Byte consisting of
the slave Register Address (RA). The Slave Acknowledges [A] and the master sends the appropriate 8 bit Data
Byte (WD0). Again the slave Acknowledges [A]. In case the master needs to write more data, a succeeding 8 bit
Data Byte will follow (WD1), acknowledged by the slave [A]. This sequence will be repeated until the master
terminates the transfer with the Stop condition [P].
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SX1508QB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine |
| SX1508QBIULTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine |
| SX1509BEVK | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine |
| SX1509BIULTRT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:IC GPIO EXPANDER I2C 16CH 28QFN 制造商:Semtech Corporation 功能描述:Low Voltage Level Shifting GPIO with LED Driver and Keypad Engine 制造商:Semtech Corporation 功能描述:16 CHAN LOW VOLT I2C GPIO +PWM |
| SX1509BULTRT | 功能描述:IC GPIO EXPANDER I2C 16CH 28QFN RoHS:是 類別:集成電路 (IC) >> 接口 - I/O 擴展器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 接口:I²C，JTAG 輸入/輸出數(shù):9 中斷輸出:無 頻率 - 時鐘:400kHz 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 包括:EEPROM |
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