User guide

DS810UM6 Copyright 2013 Cirrus Logic P-19
CS4953x4 Pin Assignments
CS4953x4/CS4970x4 System Designer’s Guide
P.7 CS4953x4 Pin Assignments
Table P-11 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
638GPIO20
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
739GPIO19
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