315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
CS
DIO
tOFF
tCPU
tOFF
tCPU
tLOW
tRF
ADATA OR
FDATA
Figure 12. DRX Mode Sequence of the MAX1471
Table 10. Off-Timer (tOFF) Configuration
tRF
PRESCALE1
0
0
1
1
PRESCALE0
0
1
0
1
t OFF TIME BASE
(1 LSB)
120μs
480μs
1920μs
7680μs
MIN t OFF
REG 0x4 = 0x00
REG 0x5 = 0x01
120μs
480μs
1.92ms
7.68ms
MAX t OFF
REG 0x4 = 0xFF
REG 0x5 = 0xFF
7.86s
31.46s
2 min 6s
8 min 23s
Table 11. CPU Recovery Timer (tCPU)
Configuration
Table 12. RF Settle Timer (tRF)
Configuration
TIME BASE
(1 LSB)
120μs
MIN t CPU
REG 0x6 = 0x01
120μs
MAX t CPU
REG 0x6 = 0xFF
30.72ms
TIME BASE
(1 LSB)
MIN t RF
REG 0x7 = 0x00
REG 0x8 = 0x01
MAX t RF
REG 0x7 = 0xFF
REG 0x8 = 0xFF
120μs
120μs
7.86s
24
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