WM8216
Production Data
REGISTER
BIT
NO
BIT
NAME(S)
DEFAULT
DESCRIPTION
Setup
Register 3
3:0
RLCDAC[3:0]
1111
Controls RLCDAC driving VRLC/VBIAS pin to define single ended signal
reference voltage or Reset Level Clamp voltage. See Electrical Characteristics
section for ranges.
5:4
CDSREF[1:0]
01
CDS mode reset timing adjust.
00 = Advance reset sample by 1 MCLK period (relative to default).
01 = Default reset sample position.
10 = Delay reset sample by 1 MCLK period (relative to default)
11 = Delay reset sample by 2 MCLK periods (relative to default)
When MONO=0 this register bit has no effect
Monochrome mode channel select.
6
7
CHAN
0
0
00 = Odd channel select
01 = Even channel select
Must be set to 0
Not Used
Software
Reset
Any write to Software Reset causes all register bits to be reset. It is
recommended that a software reset be performed after a power-up before any
other register writes.
Setup
Register 5
0
1
3
ODDPD
EVENPD
ADCPD
0
0
0
When set powers down odd S/H, PGA
When set powers down even S/H, PGA
When set powers down ADC. Allows reduced power consumption without
powering down the references which have a long time constant when
switching on/off due to the external decoupling capacitors.
When set powers down 4-bit RLCDAC, setting the output to a high impedance
state and allowing an external reference to be driven in on the VRLC/VBIAS
pin.
4
VRLCDACPD
0
5
6
ADCREFPD
VRXPD
0
0
0
When set disables VRT, VRB buffers to allow external references to be used.
When set disables VRX buffer to allow an external reference to be used.
Must be set to 0
7
Not Used
Setup
Register 6
4:0
5
Not Used
RLCEN
00000
1
Must be set to 0
Reset Level Clamp Enable. When set Reset Level Clamping is enabled. The
method of clamping is determined by CLAMPCTRL.
6
7
CLAMPCTRL
0
0 = RLC switch is controlled directly from RSMP input pin:
RSMP = 0: switch is open
RMSP = 1: switch is closed
1 = RLC switch is controlled by logical combination of RSMP and VSMP.
RSMP && VSMP = 0: switch is open
RSMP && VSMP = 1: switch is closed
Must be set to 0
Not Used
0
PD Rev 4.0 March 2007
23
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
