Rainbow Electronics MAX7057 - Manual (Page 14)

MAX7057
300MHz to 450MHz Frequency-Programmable
ASK/FSK Transmitter
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BIT NAME FUNCTION
4-0 cap[4:0] 5-bit capacitor setting
7-5 ckdiv[2:0] 3-bit clock output frequency divider
Table 5. Configuration 0 Register (Address: 0x01)
DATA
NAME ADDRESS
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 MODE
CONTRL 0x00 0 0 spioffsht pllbw shape ckouts ckouton mode R/W
CONFIG0 0x01 ckdiv[2] ckdiv[1] ckdiv[0] cap[4] cap[3] cap[2] cap[1] cap[0] R/W
HIFREQ1 0x02 fhi[15] fhi[14] fhi[13] fhi[12] fhi[11] fhi[10] fhi[9] fhi[8] R/W
HIFREQ0 0x03 fhi[7] fhi[6] fhi[5] fhi[4] fhi[3] fhi[2] fhi[1] fhi[0] R/W
LOFREQ1 0x04 flo[15] flo[14] flo[13] flo[12] flo[11] flo[10] flo[9] flo[8] R/W
LOFREQ0 0x05 flo[7] flo[6] flo[5] flo[4] flo[3] flo[2] flo[1] flo[0] R/W
FLOAD 0x06 — — — — — — — fload R/W
DATAIN 0x07 — — — — — — — datain_bit R/W
EN 0x08 — — — — — — — enable_bit R/W
CONFIG1 0x09 0 0 0 0 0 gposel[2] gposel[1] gposel[0] R/W
STATUS 0x0C fhi/lo[15] fhi/lo[14] fhi/lo[13] fhi/lo[12] X 0 TxREADY NoXTAL R
Table 3. Register Configuration
BIT NAME FUNCTION
0 mode ASK(0) or FSK(1)
1 ckouton Crystal clock output enable(1) on GPO output
2 ckouts Crystal clock output enable(1) while part is in shutdown mode
3 shape Disable(0) or enable(1) transmitter envelope-shaping resistor
4 pllbw
PLL bandwidth setting, low(0) = 300kHz or high(1) = 600kHz; 300kHz is recommended for fractional-N
and 600kHz for fixed-N
5 spioffsht Enable(0) or disable(1) SPI communication during shutdown
Table 4. Control Register (Address: 0x00)