Datasheet CMX7146 (CML Microcircuits) - 7

BPSK Wireless Data Modulator CMX7146
3 External Components C-BUS
) A T ) A K ) C1 C A D O S T D L S A N V D A X1 C DV L D Y C2 M DD L IA P M R E O 2 E K C3 L K (R (C L (S T A A N /C C K S U T T D C L L N S L S O A A D E C4 A A S Y C V S D D V T T D C S S D S R C D X X V DVSS AUXDAC 4 AVDD MOSI 1 EPSCLK AUXDAC 3 2 MISO AVSS AVSS 3 DVDD
DACs
EPCSN AUXDAC 2 4 BOOTEN1 AUXDAC 1 R1 5 BOOTEN2 AVDD 6 AUXADC 4 DVSS 7 CMX7146Q3 IRQN AUXADC 3 8 DV AUXADC 2
ADCs
SS VDEC 9 GPIO1 AUXADC 1 10 R2 GPIO3 AUDIO OUT
AUDIO
11 GPIO4 VBIAS C5 12 13 14 15 16 17 18 C7 /C /C /C /C /C /C N N N N N N AV 1 SS S 2 S 1 2 K S S D L D IO V V O C P O D A S R3 G M M
MOD 2
Y S AVSS + C24 C23 C8 DVSS DV AV SS DVSS SS R4
MOD 1
C9 AV AV SS DD DVDD + + C17 C18 C19 C20 C21 C22 AVSS AVSS AVSS DVSS DVSS DVSS
Figure 2 CMX7146 Recommended External Components
R1 100k C5 N/F C19 10nF X1 9.6 or 19.2MHz R2 N/F C6 N/F C20 10µF See note 1 R3 100k C7 100nF C21 10nF R4 100k C8 100pF C22 10nF C1 18pF C9 100pF C23 10nF C2 18pF C10 not used C24 10µF C3 10nF C17 10µF C25 10nF C4 10µF C18 10nF C26 10µF Resistors 5%, capacitors and inductors 20% unless otherwise stated.  2019 CML Microsystems Plc Page 7 D/7146/1 Document Outline Datasheet Front Page 1 Brief Description 1.1 History 2 Signal List 3 External Components 4 PCB Layout Guidelines and Power Supply Decoupling 5 General Description 5.1 CMX7146 Features 6 Detailed Descriptions 6.1 Xtal Frequency 6.2 Host Interface 6.2.1 C-BUS Operation 6.3 Function Image Loading 6.3.1 FI Loading from Host Controller 6.3.2 FI Loading from Flash/EEPROM 6.4 Device Control 6.4.1 Device Configuration (using the Programming Register) 6.4.2 Device Configuration (using dedicated registers) 6.4.3 Interrupt Operation 6.4.4 Signal Routing 6.4.5 Loading Transmit Data 6.4.6 The Transmit Sequence 6.4.7 Other Modem Modes 6.4.8 Data Transfer 6.4.9 Raw Data Transfer 6.4.10 Pre-loading transmit data 6.4.11 Auxiliary clock rates 6.4.12 Auxiliary data 6.4.13 GPIO Pin Operation 6.4.14 Auxiliary ADC Operation 6.4.15 Auxiliary DAC / RAMDAC Operation 6.5 Digital System Clock Generators 6.5.1 System Clock Operation 6.6 Signal Level Optimisation 6.7 C-BUS Register Summary 7 CMX7146 FI-1.x Features 7.1 Modulation 7.2 Radio Interface 7.3 Transmit Performance 8 Performance Specification 8.1 Electrical Performance 8.1.1 Absolute Maximum Ratings 8.1.2 Operating Limits 8.1.3 Operating Characteristics 8.1.4 Parametric Performance 8.2 C-BUS Timing 8.3 Packaging END OF DOCUMENT