Digital PMR Radio Processor
CMX7131/CMX7141
CMX7131 CMX7141
Pin
Name
Type
64-pin
Q1/L9
48-pin
Q3/L4
Description
SPI bus Chip Select/Frame Sync
53
52
44
45
SSOUT
DVSS
OP
PWR Digital ground
C-BUS Serial Clock: The C-BUS serial clock input from the
µC
46
47
48
SCLK
SYSCLK2
CSN
IP
OP
IP
54
55
56
Synthesised Digital System Clock Output 2
C-BUS Chip Select: The C-BUS chip select input from the µC
- there is no internal pullup on this input
57
58
59
60
61
-
-
NC
OP
OP
Reserved – do not connect this pin
1
2
3
4
EPSI
Serial Memory Interface: Output: SPI bus Output
Serial Memory Interface: Clock; SPI bus Clock
EPSCLK
EPSO
IP+PD Serial Memory Interface: Input; SPI bus Input
EPSCSN
OP
Serial Memory Interface: Chip Select
Used in conjunction with BOOTEN2 to determine the
operation of the bootstrap program.
62
5
BOOTEN1
IP+PD
Used in conjunction with BOOTEN1 to determine the
operation of the bootstrap program.
63
64
6
7
BOOTEN2
DVSS
IP+PD
PWR Digital ground
On this device, the central metal pad (which is exposed on
Q1 and Q3 packages only) may be electrically unconnected
or, alternatively, may be connected to analogue ground
EXPOSED
EXPOSED
SUBSTRATE
~
METAL PAD METAL PAD
(AV ).
SS
No other electrical connection is permitted.
Notes: IP
OP
=
=
=
=
=
=
Input (+ PU/PD = internal pullup/pulldown resistor)
Output
Bidirectional
3-state output
Power connection
No Connection - should NOT be connected to any signal.
BI
TS OP
PWR
NC
3.1 Signal Definitions
Table 1 Definition of Power Supply and Reference Voltages
Signal
Name
Pins
Usage
Power supply for analogue circuits
Power supply for digital circuits
Power supply for core logic, derived from DV by on-chip regulator
AV
DV
AVDD
DVDD
VDEC
VBIAS
AVSS
DD
DD
V
V
DEC
BIAS
DD
Internal analogue reference level, derived from AV
Ground for all analogue circuits
Ground for all digital circuits
DD
AV
DV
SS
SS
DVSS
RFV
RFV
CPV
RFVDD
RFVSS
CPVDD
Power supply for RF circuits
Ground for RF circuits
Power supply for charge pump circuits
DD
SS
DD
2014 CML Microsystems Plc
Page 10
D/7141_FI-3.x/6
CMLMICRO [ CML MICROCIRCUITS ]
