Cirrus Logic CS4970x4 User Manual
Page 23
DS810
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CS49
70x4 Pin Assign
me
nts
CS4953
x4/CS497
0x4 System Desig
ner’s Gu
ide
Table P-10. CS4970x4 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
1
-
GPIO28
General Purpose Input/Output
3.3V (5V tol) BiDir
IN
2
-
GPIO29
General Purpose Input/Output
1. XMTA_IN
1. S/PDIF Pass-thru Input.
3.3V (5V tol) BiDir
IN
3
36
DBDA
Debug Data
3.3V (5V tol) In/OD
IN
4
37
DBCK
Debug Clock
3.3V (5V tol) In/OD
IN
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
6
38
GPIO20
General Purpose Input/Output
1. DAO2_DATA2
1.Digital Audio Output 2.
2. EEPROM Boot Chip Select.
3.3V (5V tol
BiDir
IN
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
8
40
DAO_MCLK
Audio Master Clock
3.3V (5V tol) BiDir
IN
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
12
44
GPIO22
General Purpose Input/Output
DAO2_SCLK
PCM Audio Bit Clock.
3.3V (5V tol) BiDir
IN
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
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
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
17
49
GPIO15
General Purpose Input/Output
1. DAO1_DATA1
2. HS1
1. Digital Audio Output 1.
2. Hardware Strap Mode Select.
3.3V (5V tol) BiDir
IN
18
50
VDDIO1
I/O power supply voltage
3.3V
PWR
19
51
DAO1_DATA0 Digital Audio Output 0
HS0
Hardware Strap Mode Select.
3.3V (5V tol) BiDir
IN
20
52
DAO1_SCLK
PCM Audio Bit Clock
3.3V (5V tol) BiDir
IN
21
53
GNDIO1
I/O ground
0V
PWR
22
54
DAO1_LRCLK PCM Audio Sample Rate Clock
3.3V (5V tol) BiDir
IN
23
-
GPIO31
General Purpose Input/Output
UART_CLK
UART Clock.
3.3V (5V tol) BiDir
IN
24
55
VDD2
Core power supply voltage
1.8V
PWR