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TC65 Hardware Interface Description
Confidential / Released
s
TC65_HD_V02.000 Page 102 of 120 08.06.2006
Parameter Min Typ Max Unit Test condition / remark
Frequency Response
16
0Hz - 100Hz
200Hz
300Hz - 3350Hz
3400Hz
4000Hz
4400Hz
-0.2
-1.1
-0.7
-39
-34
0.1
-75
dB
gs = gain setting
5.7.5 Voiceband Transmit Path
Test conditions:
• The values specified below were tested to 1kHz and default settings of audio modes,
unless otherwise stated.
• Parameter setup: Audio mode=5 for MICP1 to MICN1 and 6 for MICP2 to MICN2,
inBbcGain=0, inCalibrate=32767, outBbcGain=0, OutCalibrate=16384, sideTone=0
Table 33: Voiceband transmit path
Parameter Min Typ Max Unit Test condition / Remark
Full scale input voltage (peak to
peak) for 3.14dBm0
MICP1 to MICN1 or AGND, MICP2 to
MICN2 or AGND
1.6 V
MICPx must be biased with
1.25V (VMIC/2)
Nominal input voltage (peak to peak)
for 0dBm0
MICP1 to MICN1 or AGND, MICP2 to
MICN2 or AGND
1.1 V
MICPx must be biased with
1.25V (VMIC/2)
Input amplifier gain in 6dB steps
(inBbcGain)
0 42 dB Set with AT^SNFI
Fine scaling by DSP (inCalibrate) - 0 dB Set with AT^SNFI
Microphone supply voltage VMIC 2.4 2.5 2.6 V
VMIC current 2 mA
Idle channel noise -83 -76 dBm0p
Signal to noise and distortion 70 77 dB
Frequency response
16
0Hz - 100Hz
200Hz
300Hz - 3350Hz
3400Hz
4000Hz
4400Hz
-0.2
-1.1
-0.7
-39
-34
0.1
-75
dB
16
This is the frequency response from a highpass and lowpass filter combination in the DAC of the baseband
chip set. If the PCM interface is used, this filter is not involved in the audio path. Audio mode 1 to 4 incorporate
additional frequency response correction filters in the digital signal processing unit and are adjusted to their
dedicated audio devices (see Table 31).
- Hardware Interface Descri 1
- Contents 3
- Figures 6
- 0 Document History 7
- 1 Introduction 10
- 1.2 Terms and Abbreviations 11
- 1.3 Type Approval 14
- 1.4 Safety Precautions 16
- 2 Product Concept 18
- 2.2 TC65 System Overview 21
- 2.3 Circuit Concept 22
- 3 Application Interface 23
- 3.1 Operating Modes 24
- 3.2 Power Supply 26
- 3.3.1 Turn on TC65 28
- 31
- Table 6: Signal states 34
- 3.3.3 Turn off TC65 36
- 3.3.4 Automatic Shutdown 39
- 3.3.4.5 Overvoltage Shutdown 41
- 3.5 Charging Control 43
- 3.5.1 Hardware Requirements 43
- 3.5.2 Software Requirements 43
- 3.5.4 Charger Requirements 45
- 3.6 Power Saving 48
- AT interface disabled 49
- AT interface enabled 49
- 3.8 RTC Backup 51
- 3.9 SIM Interface 52
- 3.10 Serial Interface ASC0 53
- 3.11 Serial Interface ASC1 55
- 3.12 USB Interface 56
- C Interface 59
- Figure 20: I 60
- 3.14 SPI Interface 61
- SPI MODE 0 SPI MODE 1 62
- SPI MODE 2 SPI MODE 3 62
- Clock phase 62
- Clock polarity 62
- 3.15 Audio Interfaces 63
- 3.15.1 Speech Processing 64
- 3.15.2 Microphone Circuit 64
- GSM module 68
- Figure 29: PCM timing 70
- 3.17 GPIO Interface 72
- 3.18 Control Signals 73
- 3.18.4 PWR_IND Signal 75
- 4 Antenna Interface 76
- Antenna 77
- 4.2 Antenna Pad 78
- 4.2.1 Suitable Cable Types 78
- 4.3 Antenna Connector 79
- 5.2 Operating Temperatures 84
- 5.3 Storage Conditions 85
- EMRG_RST 89
- 5.6 Power Supply Ratings 95
- 5.7.4 Voiceband Receive Path 101
- 5.8 Air Interface 103
- 5.9 Electrostatic Discharge 104
- 6 Mechanics 105
- Confidential / Released 106
- 7 Sample Application 111
- 8 Reference Approval 113
- 9 Appendix 115
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