P.7 cs4953x4 pin assignments – Cirrus Logic CS4970x4 User Manual
Page 30
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CS49
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CS4953
x4/CS497
0x4 System Desig
ner’s Gu
ide
P.7 CS4953x4 Pin Assignments
shows the names and functions for each pin.
Table P-11. CS4953x4 Pin Assignments for 144-Pin and 128-Pin Packages
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
1
-
GPIO28
General Purpose Input/
Output
3.3V (5V
tol)
BiDir
IN
Y
2
-
GPIO29
General Purpose Input/
Output
1. XMTA_IN
1. S/PDIF Pass-thru Input.
3.3V (5V
tol)
BiDir
IN
Y
3
36
DBDA
Debug Data
3.3V (5V
tol)
In/OD
IN
Y
4
37
DBCK
Debug Clock
3.3V (5V
tol)
In/OD
IN
Y
5
-
GPIO21
General Purpose Input/
Output
1. DAO2_DATA3
2. XMTB
3. UART_TX_ENABLE
1. Digital Audio Output 3.
2. Outputs IEC60958/61937 format bi-
phase mark encoded S/PDIF data.
3. Enable the UART_TX pin.
3.3V (5V
tol
BiDir
IN
Y
6
38
GPIO20
General Purpose Input/
Output
1. DAO2_DATA2
2. EE_CS
1.Digital Audio Output 2.
2. EEPROM Boot Chip Select.
3.3V (5V
tol
BiDir
IN
Y
7
39
GPIO19
General Purpose Input/
Output
1. DAO2_DATA1
2. HS4
1. Digital Audio Output 1.
2. Hardware Strap Mode Select.
3.3V (5V
tol)
BiDir
IN
Y
8
40
DAO_MCLK
Audio Master Clock
3.3V (5V
tol)
BiDir
IN
Y
9
41
TEST
Test
3.3V (5V
tol)
In
10
42
VDD1
Core power supply voltage
1.8V
PWR
11
43
GPIO18
General Purpose Input/
Output
1. DAO2_DATA0
2. HS3
1. Digital Audio Output 0.
2. Hardware Strap Mode Select.
3.3V (5V
tol)
BiDir
IN
Y
12
44
GPIO22
General Purpose Input/
Output
DAO2_SCLK
PCM Audio Bit Clock.
3.3V (5V
tol)
BiDir
IN
Y
13
45
GNDD1
Core ground
0V
PWR
14
46
GPIO23
General Purpose Input/
Output
DAO2_LRCLK
Serial PCM Audio Sample Rate Clock
for the serial data pins:
(DAO2_DATA0, DAO2_DATA1,
DAO2_DATA2, DAO2_DATA3).
3.3V (5V
tol)
BiDir
IN
Y
15
47
GPIO17
General Purpose Input/
Output
1. DAO1_DATA3
2. XMTA
1. Digital Audio Output 3.
2. S/PDIF Audio Output A.
3.3V (5V
tol)
BiDir
IN
Y
16
48
GPIO16
General Purpose Input/
Output
1. DAO1_DATA2
2. HS2
1. Digital Audio Output 2.
2. Hardware Strap Mode Select.
3.3V (5V
tol)
BiDir
IN
Y