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CDCUN1208LP bảng dữ liệu(PDF) 26 Page - Texas Instruments

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tên linh kiện CDCUN1208LP
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CDCUN1208LP bảng dữ liệu(HTML) 26 Page - Texas Instruments

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CDCUN1208LP
CDCUN1208LP
MODE
ADDR/CS
SDA/MOSi
SCK
OTTP
ERC
MISO
OUTn
OUT2
OUT1
Power
On
Reset
(POR)
MODE
High or Low
Pin Configuration Mode
Host Configuration Mode
Open
ITTP
DIVIDE
IN2
IN1
Power
On
Reset
(POR)
OUTn
OUT2
OUT1
INSEL
IN2
IN1
INSEL
OE
CDCUN1208LP
SCAS928 – MAY 2012
www.ti.com
When the host interface is enabled, certain pins take on alternative functions according to Table 9.
Table 9. CDCUN1208LP Host Configuration Pins
PIN NAME
PIN NAME IN PIN CONFIGURATION
ALT PIN NAME
PIN
PIN NAME IN HOST PROGRAMMING MODE
IN
MODE
IN PIN MODE
NUMBER
(MODE/Pin 30 is tied high or low)
(MODE = OPEN)
HOST MODE
(only if MODE/Pin 30 is OPEN)
MODE
30
Programming Mode
1 = I2C, 0 = SPI,OPEN = Pins (alternative
description applies)
SDA/MOSI
DIVIDE
1
Host Interface Data (I2C), SPI MasterOutput
Input Divider Pin Control
Slave Input (Data In)
MISO
OTTP
19
SPI Master Input Slave Output (DataOut)
Output Type (OTTP) Pin Control
SCL
OE
32
Host Interface Clock
Device Output Enable
1 = Enable, 0 = Disable
ADDR/CS
ERC
31
Host Interface Address (I2C)/Chip Select (SPI)
Output Edge Rate Control
1 = Fast, 0 = Slow, OPEN = Medium
The CDCUN1208LP samples the MODE pin after the device exits the power on reset (POR) state. The device is
placed in the RESET state in one of two ways: a power on reset (POR) circuit automatically resets the device
after power is applied; or through the RESET bit (R15[1]) in register memory (see Table 11). This RESET bit is
only accessable in host configuration mode. If the MODE pin (pin 11) is open (no connection), then the device is
placed in the pin configuration mode and all settings are determined by the state of various pins according to
Table 2 and Figure 28. If the MODE pin is low, then device enables the SPI interface; and, if MODE is high, then
I2C is enabled.
Figure 31. CDCUN1208LP Pin and Host Configuration Mode
26
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s) :CDCUN1208LP



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