Cirrus Logic CS4970x4 User Manual
Page 31
DS810
UM6
C
op
yri
ght 2
013
Ci
rru
s
Lo
gic
P
-20
CS49
53x4 Pin Assign
me
nts
CS4953
x4/CS497
0x4 System Desig
ner’s Gu
ide
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
Y
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
Y
21
53
GNDIO1
I/O ground
0V
PWR
22
54
DAO1_LRCLK
PCM Audio Sample Rate
Clock
3.3V (5V
tol)
BiDir
IN
Y
23
-
GPIO31
General Purpose Input/
Output
UART_CLK
UART Clock.
3.3V (5V
tol)
BiDir
IN
Y
24
55
VDD2
Core power supply voltage
1.8V
PWR
25
-
GPIO25
General Purpose Input/
Output
UART_TXD
UART Output.
3.3V (5V
tol)
BiDir
IN
Y
26
-
GPIO24
General Purpose Input/
Output
UART_RXD
UART Input.
3.3V (5V
tol)
BiDir
IN
Y
27
56
GNDD2
Core ground
0V
PWR
28
57
SD_DQM0
SDRAM Data Mask 0
3.3V (5V
tol)
OUT
29
58
SD_D7
SDRAM Data Bit 7
EXT_D7
Flash Data Bit 7.
3.3V (5V
tol)
BiDir
IN
Y
30
59
SD_D6
SDRAM Data Bit 6
EXT_D6
Flash Data Bit 6.
3.3V (5V
tol)
BiDir
IN
Y
31
60
SD_D5
SDRAM Data Bit 5
EXT_D5
Flash Data Bit 5.
3.3V (5V
tol)
BiDir
IN
Y
32
61
SD_D4
SDRAM Data Bit 4
EXT_D4
Flash Data Bit 4.
3.3V (5V
tol)
BiDir
IN
Y
33
62
VDDIO2
I/O power supply voltage
3.3V
PWR
34
63
SD_D3
SDRAM Data Bit 3
EXT_D3
Flash Data Bit 3.
3.3V (5V
tol)
BiDir
IN
Y
35
64
SD_D2
SDRAM Data Bit 2
EXT_D2
Flash Data Bit 2.
3.3V (5V
tol)
BiDir
IN
Y
36
67
GNDIO2
I/O ground
0V
PWR
37
65
SD_D1
SDRAM Data Bit 1
EXT_D1
Flash Data Bit 1.
3.3V (5V
tol)
BiDir
IN
Y
Table P-11. CS4953x4 Pin Assignments (Continued) for 144-Pin and 128-Pin Packages (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