Exar XRD9829REF, User Manual

Page: 7 / 24

XRD9829REF
7
Rev. 1.00
Control Registers
Function D7 D6 D5 D4 D3 D2 D1 D0 Power-up
(Register State
S1/S0) (Note 1)
Gain
(00) G5 G4 G3 G2 G1 G0 X X 000000XX
(MSB) (LSB)
Offset O7 O6 O5 O4 O3 O2 O1 O0 01000000
(01) (MSB) (LSB)
Mode X X V
RT
INPUT DC DC/AC CIS/CCD MUX SEL MUX SEL XX000000
(10) 0: INTERNAL REFERENCE 0: DC 0: CIS
1: EXTERNAL (V
DCREF
) 1: AC 1: CCD
0:INTERNAL 0 0: VIN0 0 0: VIN0
(V
DCREF
= 0 1: VIN1 0 1: VIN1
AGND) 1 0: VIN2 1 0: VIN2
1: EXTERNAL 1 1: VIN3 1 1: VIN3
(V
DCREF
=V
DCEXT
)
Mode
& Test
(11) X X X DIGITAL RESET TEST3 TEST2 TEST1 X XXX0000X
0: NO RESET 0: TEST3 0: TEST2 0: TEST1
1: RESET DISABLED DISABLED DISABLED
(REGISTERS ARE 1: OUTPUT 1: OUTPUT 1: VIN1 PIN
RESET TO OF BUFFER OF PGA TIED TO
POWER-UP TIED TO VIN3 TIED TO INPUT OF
STATES) PIN (VIN3 PIN VIN2 PIN ADC
BECOMES (VIN2 PIN (PGA OUTPUT
AN OUTPUT) BECOMES DISCONNECTED
AN OUTPUT) FROM INPUT
OF ADC)
Table 1. Control Register Description for XRD9829
Note:
1 These are the control register settings upon initial power–up. The previous register settings are retained following a
logic power-down initiated by the PDB signal.