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ATWILC3000A Datasheet(PDF) 21 Page - Microchip Technology

No. de pieza ATWILC3000A
Descripción Electrónicos  Single Chip IEEE 802.11 b/g/n Link Controller with Integrated Bluetooth짰 5.0
PDF  56 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATWILC3000A Datasheet(HTML) 21 Page - Microchip Technology

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Table 7-2. SPI Client Interface Pin Mapping
Pin #
SPI Function
12
CFG: Must be connected to VDDIO
30
SCK: Serial Clock
31
TXD: Serial Data Transmit (MISO)
32
SSN: Active-Low Client Select
34
RXD: Serial Data Receive (MOSI)
When the SPI is not selected, that is, when SSN is high, the SPI interface will not interfere with data transfers
between the serial host and other serial client devices. When the serial Client is not selected, its transmitted data
output is buffered, resulting in a high-impedance drive onto the serial Host receive line.
The SPI Client interface responds to a protocol that allows an external Host to read or write any register in the chip
and initiate DMA data transfers.
The SPI Client interface supports four standard modes as determined by the Clock Polarity (CPOL) and Clock Phase
(CPHA) settings. These modes are illustrated in the following table.
Table 7-3. SPI Client Modes
Mode
CPOL
CPHA
0(1)
0
0
1
0
1
2
1
0
3
1
1
Note: 
1.
The ATWILC3000A firmware uses “SPI Mode 0” to communicate with the host.
The red lines in the following figure correspond to the Clock Phase at 0 and the blue lines correspond to the Clock
Phase at 1.
Figure 7-2. SPI Client Clock Polarity and Clock Phase Timing
ATWILC3000A
External Interfaces
© 2015-2021 Microchip Technology Inc.
Datasheet
DS70005427B-page 21



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