Table 4. hardware mode start-up pin conditions, 3 hardware mode equivalent register settings, Table 4 – Cirrus Logic CS8416 User Manual
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DS578F3
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CS8416
each mode, every start-up option select pin (except for TX, which has an internal pull-down) MUST have an
external pull-up or pull-down resistor as there are no internal pull-up or pull-down resistors for these startup
conditions (set after reset).
15.3 Hardware Mode Equivalent Register Settings
Listed below are the equivalent values that the registers are set to in Hardware Mode.
Control0 Register (00h)
FSWCLK
= 0
PDUR
= Set by TX pin pull-up/down after reset.
TRUNC
= 0
Control1 Register (01h)
SWCLK
= Set to 1 if there a transition on OMCK after reset. Otherwise set to 0.
MUTSAO
= 0
INT[1:0]
= N/A.
HOLD[1:0]
= 00
RMCKF
= Set by U pin pull-up/down after reset.
CHS
= 0
Control2 Register (02h)
DETCI
= N/A
EMPH_CNTL[2]
= set by 96KHZ pull-up/down after reset. See
for the de-emphasis filter re-
sponse.
EMPH_CNTL[1:0]
= 00
GPO0SEL[3:0]
= N/A
Control3 Register (03h)
GPO1SEL[3:0]
= N/A
GPO2SEL[3:0]
= N/A
Pin Name
Pull Down to DGND Function
Pull Up to VL Function
SDOUT
Hardware Mode
Software Mode
RCBL
Serial Port Slave Mode
Serial Port Master Mode
AUDIO
Serial Format Select 1 (SFSEL1)=0
Serial Format Select 1 (SFSEL1)=1
C
Serial Format Select 0 (SFSEL0)=0
Serial Format Select 0 (SFSEL0)=1
U
RMCK Frequency=256*F
s
RMCK Frequency=128*F
s
TX
Normal Phase Detector update rate.
Higher Phase Detector update rate.
96KHZ
Emphasis Audio Match Off
Emphasis Audio Match On
NV/RERR
NVERR Selected
RERR Selected
Table 4. Hardware Mode Start-Up Pin Conditions