Rainbow Electronics MAX7057 User Manual
Page 12
MAX7057
300MHz to 450MHz Frequency-Programmable
ASK/FSK Transmitter
12
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Using a byte descriptive notation, the read command
can be viewed as the following sequence, within the
same CS cycle:
With this command, all the registers can be read within
the same cycle of CS. The addresses can be given in
any order.
Read-All: To execute an SPI read-all operation, GPO
must be configured to either a CKOUT_SDO or SDO
function (see Tables 15 and 17 for details).
Using a byte descriptive notation, the read command
can be viewed as the following sequence, within two
CS cycles:
Reset: The MAX7057 can be reset to its power-up state
through the reset command.
Figure 4. SPI Read Command Format
READ ALL COMMAND (0x03)
ADDRESS N
A7 A6 A5 A4 A3 A2 A1 A0
D7
D7
D7
D6 D5 D4 D3 D2 D1 D0
D0
D0
GPO
SDI
SCLK
CS
DATA N
DATA
N + 1
DATA
N + n
GPO
SDI
SCLK
CS
D7 D6 D5 D4 D3 D2 D1 D0
A7 A6 A5 A4 A3 A2 A1 A0 A7
A7
D7
D7
A6 A5 A4 A3 A2 A1 A0
A0
D0
D0
READ COMMAND (0x02)
ADDRESS 0
ADDRESS 1
0x00
ADDRESS
N
DATA
N - 1
DATA 0
DATA N
Figure 5. SPI Read-All Command Format
SDI : <0x02> <Address 0> <Address 1> <Address2> … < Address N > < 0x00 >
GPO: < XX > < XX > < Data 0 > < Data 1 > … < Data N - 1 > <Data N>
SDI :
<0x03> <Address N>
< XX > < XX > < XX >…< XX >
<Data N> <DataN + 1> <DataN + 2>…<Data N + n>
GPO:
CS cycle 1
CS cycle 2