Cirrus Logic CS4953xx User Manual
Page 115
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14
GPIO0
General Purpose
Input/Output
1. UART_CLK
1. UART Clock
3.3V
(5V tol)
BiDir
IN
Y
122
15
GNDD7
Core ground
0V
PWR
123
16
XTAL_OUT
Buffered Reference
Clock Input/Crystal
Oscillator Input
3.3V
(5V tol)
OUT
124
17
XTI
Reference Clock
Input/Crystal Oscillator
Input
3.3V
(5V tol)
ANA
125
18
XTO
Crystal Oscillator
Output 1
3.3V
ANA
126
19
GNDA
PLL ground
1.8V
PWR
127
-
NC
Do Not Connect on
PCB
1.8V
ANA
128
20
PLL_REF_RE
S
Current Reference
Output for PLL.
Connect to resistor.
3.3V
ANA
129
21
VDDA
PLL power.
3.3V
PWR
130
22
VDD8
Core power supply
voltage
1.8V
PWR
131
23
GPIO14
General Purpose
Input/Output
1. DAI1_DATA3
2. DSD3
1. PCM Audio Input Data 3
2. DSD Audio Input Data 3
3.3V
(5V tol)
BiDir
IN
Y
132
24
GPIO13
General Purpose
Input/Output
1. DAI1_DATA2
2. DSD2
1. PCM Audio Input Data 2
2. DSD Audio Input Data 2
3.3V
(5V tol)
BiDir
IN
Y
133
25
GNDD8
Core ground
0V
PWR
134
26
GPIO12
General Purpose
Input/Output
1. DAI1_DATA1
2. DSD1
1. PCM Audio Input Data 1
2. DSD Audio Input Data 1
3.3V
(5V tol)
BiDir
IN
Y
135
27
DAI1_DATA0
PCM Audio Input Data
0
DSD0
DSD Audio Input Data 0
3.3V
(5V tol)
In
Y
136
28
VDDIO8
I/O power supply
voltage
3.3V
PWR
Table 9-10. Pin Assignments (Continued)
LQFP-
144
Pin #
LQFP-
128
Pin #
Function 1
(Default)
Description of Default
Function
Secondary Functions
Description of Secondary
Functions
Pwr
Type
Reset
State
Pullup
at
Reset