WM8581SEFT Wolfson Microelectronics Ltd., WM8581SEFT Datasheet - Page 6

• Manufacturer Part Number: WM8581SEFT
• Description: Multichannel Codec with S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8581
MULTI-FUNCTION PINS
The WM8581 has 7 Multi-Function Input/Output pins (MFP1 etc.). The function and direction (input/output) of these pins
reconfigured using the HWMODE input pin and software register control as shown below. If HWMODE is set, the MFPs have the
function shown in column 1 of Table 1. If HWMODE is not set, and the register SAIF_EN is set, the MFPs have the function shown
in column 2. Otherwise, the GPOnOP registers determine the MFP function as shown in columns 3 and 4.
Notes:
1.
2.
3.
w
Table 1 Multi-Function Pin Configuration
Notes :
1.
2.
3.
PIN
47
48
These pins are not used as part of the Secondary Audio Interface, so their function is that of either Column 3 or Column 4.
MFP1 can by GPO1 only if ADC_CLKSEL and PAIFTXMST_CLKSEL (if in master mode) source MCLK.
MFP2 can be GPO2 if neither ADC_CLKSEL, TX_CLKSEL or SAIFMST_CLKSEL (if in master mode) source ADCMCLK.
PIN NAME
Digital input pins have Schmitt trigger input buffers. Pins 32, 33, 34 are 5V tolerant.
In hardware control mode, pin 30 is used for UNLOCK flag output.
In hardware control mode, pin 31 is used for NON_AUDIO flag output.
MFP1
MFP2
MFP3
MFP4
MFP5
MFP6
MFP7
VOUT3R
VOUT3L
NAME
CONTROL MODE
PAIFTX_BCLK
HARDWARE
FUNCTION
ADCMCLK
ALLPD
DR1
DR2
DR3
DR4
Y
1
HWMODE = 1
Analogue Output
Analogue Output
TYPE
INTERFACE FUNCTION
SECONDARY AUDIO
SAIF_LRCLK
SAIF_DOUT
SAIF_BCLK
SAIF_DIN
N
n/a
n/a
n/a
Y
2
1
1
1
DAC channel 3 left output
DAC channel 3 right output
SAIF_EN = 1
S/PDIF INPUT &
PAIFTX_BCLK
INDEPENDENT
ADCMCLK
CLOCKING
N
SPDIFIN2
SPDIFIN3
SPDIFIN4
GPO6
GPO7
3
DESCRIPTION
3
GPIOnOP
2
GENERAL PURPOSE
OUTPUT FUNCTION
PP Rev 1.0 March 2006
GPO1
GPO2
GPO3
GPO4
GPO5
GPO6
GPO7
4
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