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TC65 Hardware Interface Description
Confidential / Released
s
TC65_HD_V02.000 Page 93 of 120 08.06.2006
Function Signal name IO Signal form and level Comment
ADC1_IN I Analog
Digital
Converter
ADC2_IN I
Input voltage: V
I
min = 0V, V
I
max = 2.4V
6
Ri 750kOhms
6
Measurement interval: 100ms – 30s
selectable by AT command
Sensitivity, accuracy: 2400 steps (1step =
1mv)
Cut-off frequency: 30 Hz
Underflow: -25mV
Overflow: +2425 mV
Accuracy: ± 0.5mV
Linear error: ± 0.5mV
Temperature error: ± 0.5mV
Burst error: ± 0.5mV
Inputs used for measuring
external voltages.
ADC1_IN and ADC2_IN are
internally multiplexed through
analog switch.
Digital
Analog
Converter
DAC_OUT O V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
PWM signal which can be
smoothed by an external
filter.
Use the AT^SWDAC
command to open and
configure the DAC_OUT
output.
GPIO1 I/O
GPIO2 I/O
GPIO3 I/O
GPIO4 I/O
GPIO5 I/O
GPIO6 I/O
GPIO7 I/O
GPIO8 I/O
GPIO9 I/O
General
Purpose
Input/Output
GPIO10 I/O
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.15V,
V
IH
max = VEXTmin + 0.3V = 3.05V
Pulse counter:
pulse
~
|________|
~~~~~~~~~~~~~
|________|
~~~
| 450µs | 450µs |
Slew rate 1µs
Pulse rate: max. 1000 pulses per second
Recommendation: Connect
pull-up or pull-down resistors
to all GPIO pins intended for
use as output. See also
chapter
3.17.
If lines are unused (not
configured) keep pins open.
Alternatively, the GPIO10 pin
can be configured as a pulse
counter for pulse rates from 0
to 1000 pulses per second.
DAI0
O
DAI1
I
DAI2
O
DAI3
O
DAI4
I
DAI5 I
Digital Audio
interface
DAI6 I
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.15V
V
IH
max = VEXTmin + 0.3V = 3.05V
See
Table 15 for details.
If unused keep pins open.
6
For restrictions please refer to chapter 3.16.
- 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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