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Pin
Signal Name
49
PCMO
50
PCMI
51
PCMSYNC
52
PCMCLK
53
MICP
54
MICN
55
BEARP
56
BEARN
57
AFMS
58
SERVICE
59
ATMS
60
AGND
5.2 General Electrical and Logical Characteristics
5.2.1 General Protection Requirements
LZT 123 7589 R1A
5. SYSTEM CONNECTOR INTERFACE
Dir
Signal Type
O
Digital 2.75V
I
Digital 2.75V
O
Digital 2.75V
O
Digital 2.75V
I
Analogue
I
Analogue
O
Analogue
O
Analogue
O
Analogue
I
2.7V
I
Analogue
-
Analogue
Many of the signals, as indicated in the table above, are high-speed CMOS
logic inputs or outputs powered from a 2.75 V ± 5 % internal voltage
regulator, and are defined as Digital 2.75 V. Whenever a signal is defined
as Digital 2.75 V, the following electrical characteristics apply.
Parameter
High Level Output Voltage (V
Low Level Output Voltage (V
High Level Input Voltage (V
Low Level Input voltage (V
Unused pins can be left floating.
• All 2.75 V digital inputs will continuously withstand and suffer no
damage in the power-on or power-off condition when subjected to any
voltage from - 0.5 V to 3.47 V (3.3 V + 5 %).
• All 2.75 V digital outputs will continuously withstand a short circuit to
any other voltage within the range 0 V to 3 V.
• All analogue outputs will continuously withstand a short circuit to any
voltage within the range 0 V to 3 V.
Description
Codec PCM digital audio output
Codec PCM digital audio input
DSP PCM frame sync
DSP PCM clock output
Microphone Input positive
Microphone Input negative
Speaker output positive
Speaker output negative
Audio output from radio device
Flash programming voltage for the MS.
Enable logger information if not
flashing.
Audio input to radio device
Analogue ground
Min.
), I
= –2mA
2.2
OH
o
), I
= 2mA
0
OL
o
)
1.93
IH
)
0
IL
Max.
Units
2.75
V
0.6
V
2.75
V
0.5
V
22
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