Cirrus Logic CS4970x4 - 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