Datasheet

MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
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Table 3. MAX2309 Control Register States
Note: H = high, L = low, 1 = logic high, 0 = logic low, X = don’t care, blank = independent parameter.
1
1
1
1
0 1
X 1
X 0
X X
SHDN
STBY
1/
0
X0
LO BUFFER
ENABLE
If pin is floated, then
BUFEN register bit
controls buffer
H F
XX0
LO BUFFER
ENABLE
BUFEN pin controls the
LO buffer and overrides
the bit
H/
L
H
X
1/
0
0
DIVIDER
SELECT
If DIVSEL pin is floated,
then register bit selects
divider
HH F
XX0
DIVIDER
SELECT
DIVSEL pin overrides
DIVSEL register bit
HH
H/
L
X0STANDBY
0 in standby register bit
turns off VGA and mod-
ulator only
H
H/
L
H
X0STANDBY
0 in standby pin turns
off VGA and modulator
only
LH
XX XXX XXX XXSHUTDOWN
0 in shutdown register
bit leaves serial bus
active
XH X XX
XX X
IN_SEL
FM_TYPE
X
BUFEN
OPERATIONAL
MODE
ACTION
RESULT
BUF_DIV
X X
VCO_SEL
VCO_BYP
XX X
DIVSEL
TURBOCHARGE
X
TES_TEN
SHUTDOWN
Shutdown pin com-
pletely powers down
the chip
CP_POL
XL X X
TEST_MODE
PINS
STBY
X
BUFEN
SHDN
DIVSEL
ML
S CONTROL REGISTER S
BB