Digital PMR Radio Processor
CMX7131/CMX7141
CMX7131 CMX7141
Pin
Name
Type
64-pin
Q1/L9
48-pin
Q3/L4
Description
Alternate input amplifier feedback
19
20
21
22
23
24
ALTFB
MICFB
MIC
OP
OP
IP
27
28
29
30
31
32
Microphone input amplifier feedback
Microphone inverting input
AVSS
MOD1
MOD2
PWR Analogue ground
OP
OP
Modulator 1 output
Modulator 2 output
Internally generated bias voltage of about AV /2, except
DD
when the device is in ‘Powersave’ mode when VBIAS will
25
VBIAS
OP
discharge to AVSS. Must be decoupled to AV by a
33
SS
capacitor mounted close to the device pins. No other
connections allowed.
26
27
28
29
30
AUDIO
ADC1
ADC2
ADC3
ADC4
OP
IP
Audio Output in SPI-Codec mode
34
35
36
37
38
Each of the two ADC blocks
can select its input signal
from any one of these input
pins, or from the MIC, ALT or
DISC input pins. See section
8.1.3 for details.
Auxiliary ADC input 1
Auxiliary ADC input 2
Auxiliary ADC input 3
Auxiliary ADC input 4
IP
IP
IP
Analogue +3.3V supply rail. Levels and thresholds within the
device are proportional to this voltage. This pin should be
39
31
AVDD
PWR
decoupled to AV by capacitors mounted close to the
SS
device pins.
40
41
42
43
44
-
32
33
34
35
36
37
DAC1
DAC2
AVSS
DAC3
DAC4
DVSS
OP
OP
Auxiliary DAC output 1/RAMDAC
Auxiliary DAC output 2
PWR Analogue ground
OP
OP
Auxiliary DAC output 3
Auxiliary DAC output 4
PWR Digital ground
Internally generated 2.5V supply voltage. Must be decoupled
to DV by capacitors mounted close to the device pins. No
other connections allowed, except for the optional connection
SS
45
38
VDEC
PWR
to RFVDD
.
46
47
39
40
XTAL/CLK
XTALN
IP
Input from the external clock source or Xtal
The output of the on-chip Xtal oscillator inverter.
NC if external clock used.
OP
Digital +3.3V supply rail. This pin should be decoupled to
DVSS by capacitors mounted close to the device pins.
48
49
41
42
DVDD
PWR
IP
CDATA
C-BUS Command Data: Serial data input from the µC
C-BUS Reply Data: A 3-state C-BUS serial data output to the
43
RDATA
-
TS OP µC. This output is high impedance when not sending data to
the µC.
50
51
-
NC
Reserved – do not connect this pin
2014 CML Microsystems Plc
Page 9
D/7141_FI-3.x/6
CMLMICRO [ CML MICROCIRCUITS ]
