MAX2369 MAXIM [Maxim Integrated Products], MAX2369 Datasheet - Page 12

• Manufacturer Part Number: MAX2369
• Description: Complete Dual-Band Quadrature Transmitter
• Manufacturer: MAXIM [Maxim Integrated Products]

Complete Dual-Band
Quadrature Transmitter
12
Table 3. Operation Control Register (OPCTRL)
SIDE_BAND
MOD_TYPE
BIT NAME
SHDN_BIT
ICP_MAX
UNUSED
UNUSED
UNUSED
BUF_EN
LO_SEL
TXSTBY
MODE
______________________________________________________________________________________
STBY
IFG
POWER-UP
STATE
100
01
1
0
0
0
0
1
0
1
1
1
1
LOCATION
(0 = LSB)
12, 11
8, 7, 6
BIT
15
14
13
10
9
5
4
3
2
1
0
1 selects LOL input port; 0 selects LOH port.
Set to 0 for normal operation.
1 keeps IF turbo-mode current active even when frequency acquisition is
achieved. This mode is used when high operating IF charge-pump current is
needed.
Sets operating mode according to the following:
00 = FM mode
01 = Cellular digital mode; RFL is selected
10 = Not used
11 = PCS mode; RFH is selected
Set to 0 for normal operation.
Set to 0 for normal operation.
3-bit IF gain control. Alters IF gain by approximately 2dB per LSB (0 to 14dB).
Provides a means for adjusting balance between RF and IF gain for optimized
linearity.
When this register is 1, the upper sideband is selected (LO below RF). When
this register is 0, the lower sideband is selected (LO above RF).
0 turns IFLO buffer off; 1 turns IFLO buffer on.
0 selects direct VCO modulation. (IF VCO is externally modulated and the I/Q
modulator is bypassed); 1 selects quadrature modulation.
0 shuts down everything except registers and serial interface.
0 shuts down modulator and upconverter, leaving PLL locked and registers
active. This is the programmable equivalent to the TXGATE pin.
0 shuts down everything except serial interface, and also resets all registers to
power-up state.
FUNCTION