Datasheet
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
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*The power-on register settings are not production tested. Recommended register settings must be loaded after V
CC
is supplied.
Table 14. Recommended Register Settings*
DATA ADDRESS
REGISTER
D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 (A3:A0)
TABLE
0 01011101000000 0000 15
1 01000110011010 0001 16
2 01000000000011 0010 17
3 00000001111001 0011 18
4 11011001100110 0100 19
5 00000010100100 0101 20
6 00000001100000 0110 21
7 01000000100010 0111 22
8 10000000100001 1000 23
9 00001110110101 1001 24
10 01110110100100 1010 25
11 00000001111111 1011 26
12 00000101000000 1100 27
13 00111010010010 1101 28
14 00001100111011 1110 29
15 00000101000101 1111 30
BIT 16BIT 2BIT 1 BIT 24BIT 23BIT 15
t
CH
DIN
t
CSS
SCLK
t
CSO
t
DS
t
DH
t
CL
t
CSW
t
CSH
t
CS1
CS
Figure 2. 3-Wire SPI Serial-Interface Timing Diagram
Programmable Registers and
3-Wire SPI-Interface
The MAX2831/MAX2832 include 16 programmable, 18-
bit registers. The 14 most significant bits (MSBs) are
used for register data. The 4 least significant bits
(LSBs) of each register contain the register address.
See Table 14 for a summary of the registers and rec-
ommended register settings.
Register data is loaded through the 3-wire SPI/
MICROWIRE™-compatible serial interface. Data is
shifted in MSB first and is framed by CS. When CS is
low, the clock is active, and data is shifted with the ris-
ing edge of the clock. When CS transitions high, the
shift register is latched into the register selected by the
contents of the address bits. See Figure 2. Only the last
18 bits shifted into the device are retained in the shift
register. No check is made on the number of clock
pulses. For programming data words less than 14 bits
long, only the required data bits and the address bits
need to be shifted, resulting in faster Rx and Tx gain
control where only the LSBs need to be programmed.
MICROWIRE is a trademark of National Semiconductor Corp.