Information

NXP Semiconductors
AN11022
CLRC663 Quickstart Guide
PMU
TX
TX1
TX2
TVSS
PD
V-Regulators 1.8V
HPD
Control
VDD
DVDD
TVDD
AVDD
Fig 2. Power supply diagram
2.3 Interface selection
The CLRC663 supports direct interfacing of various hosts as the SPI, I2C, I2CL and serial
UART interface type. The CLRC663 resets its interface and checks the current host
interface type automatically having performed a Power-On or Hard Reset. The CLRC663
identifies the host interface by the means of the logic levels on the control pins after the
Reset Phase. This is done by a combination of fixed pin connections
IF1SEL0 and
IF1SEL1.
The following table shows the different configurations:
Table 1. Connection Scheme for detecting the different Interface Types
UART
SPI
I2C
I2C-L
IF0
I/O
Rx
MOSI
ADR1
ADR1
IF1(SCL)
I/O
SCK
SCL
SCL
IF2
I/O
Tx
MISO
ADR2
SDA
IF3-SDA
SDA
Trigger
NSS
SDA
ADR2
IFSEL0
I
0
0
1
1
IFSEL1
I
0
1
0
1
PDOWN
AN11022 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2015. All rights reserved.
Application note
COMPANY PUBLIC
Rev. 1.2 — 14 January 2015
205912
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