th May 2012 www.semtech.com 13 SX1504/SX1505/SX1506 4/8/16 Channel GP" />
參數(shù)資料
型號(hào)： SX1506I091TRT
廠商： Semtech
文件頁(yè)數(shù)： 5/31頁(yè)
文件大?。?/td> 0K
描述： IC GPIO EXP I2C 16CH 28UTQFN
標(biāo)準(zhǔn)包裝： 1
接口： I²C
輸入/輸出數(shù)： 16
中斷輸出： 是
頻率 - 時(shí)鐘： 400kHz
電源電壓： 2.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-UFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 28-QFN-UT（4x4）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： SX1506I091DKR
WIRELESS & SENSING
Rev 3 – 16
th May 2012
www.semtech.com
13
SX1504/SX1505/SX1506
4/8/16 Channel GPIO
4.3
SX1506 16-channel GPIO
I
2C Bus
Control
VCC1
Input
Filter
Reset
VDDM
NRESET
SCL
SDA
Interrupt
8-Bit
R/W
I/O[0]
I/O[1]
I/O[2]
I/O[3]
I/O[4]
I/O[5]
I/O[6]
I/O[7]
GND
VCC2
I/O Bank A
A
I/O Bank B
A
SX1506
I/O[8]
I/O[9]
I/O[10]
I/O[11]
I/O[12]
I/O[13]
I/O[14]
I/O[15]
8-Bit
R/W
NINT
Figure 6 – SX1506 Block Diagram
4.4
Reset (NRESET)
The SX1504, SX1505 and SX1506 generate their own power on reset signal after a power supply is connected
to the VDDM pin. The reset signal is made available for the user at the pin NRESET. The rising edge of the
NRESET indicates that the startup sequence of the SX1504, SX1505 or SX1506 has finished. NRESET must be
connected to VDDM (or greater) either directly, or via a resistor.
Undefined
t
RESET
NRESET
VDDM
VPOR
t
PULSE
VDROPH
Undefined
t
RESET
Undefined
1
2
3
4
5
6
2
1
VDROPL
Figure 7 – Power-On / Brown-out Reset Conditions
1. Device behavior is undefined until VDDM rises above VPOR, at which point NRESET is driven to GND
by the SX1504, SX1505 or SX1506.
2.
After tRESET, NRESET is released (high-impedance) by the SX1504, SX1505 or SX1506 to allow it to be
pulled high by an external resistor.
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