User guide

DS810UM6 Copyright 2013 Cirrus Logic P-12
CS4970x4 Pin Assignments
CS4953x4/CS4970x4 System Designer’s Guide
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