Telit UC864 E, UC864 G, UC864 WD, UC864 WDU User Guide
UC864 E/G/WD/WDU
Hardware User Guide
1vv0300766a Rev.4 - 03/02/09
UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
This document is relating to the following products:
PRODUCT PART NUMBER
UC864-E 4990250031
UC864-G 4990250030
UC864-WDU 4990250051
UC864-WD 4990250050
- 03/02/09
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Disclaimer
The information contained in this document is the proprietary information of Telit
Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and
any disclosure to persons other than the officers, employees, agents or
subcontractors of the owner or licensee of this document, without the prior written
consent of Telit, is strictly prohibited.
Telit makes every effort to ensure the quality of the information it makes available.
Notwithstanding the foregoing, Telit does not make any warranty as to the
information contained herein, and does not accept any liability for any injury, loss or
damage of any kind incurred by use of or reliance upon the information.
Telit disclaims any and all responsibility for the application of the devices
characterized in this document, and notes that the application of the device must
comply with the safety standards of the applicable country, and where applicable,
with the relevant wiring rules.
Telit reserves the right to make modifications, additions and deletions to this
document due to typographical errors, inaccurate information, or improvements to
programs and/or equipment at any time and without notice. Such changes will,
nevertheless be incorporated into new editions of this application note.
All rights reserved.
© 2009 Telit Communications S.p.A.
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Contents
1. OVERVIEW............................................................................................................................................................... 6
1.1. UC864-E/G/WD/WDU
PRODUCT SPECIFICATION .............................................................................................. 8
2. MECHANICAL DIMENSIONS............................................................................................................................... 9
2.
1. UC864-E
2.2. UC864-G
2.3. UC864-WD/WDU
MECHANICAL DIMENSIONS.................................................................................................................. 9
MECHANICAL DIMENSIONS ............................................................................................................... 10
MECHANICAL DIMENSIONS ................................................................................................. 11
3. UC864-E/G/WD/WDU MODULE CONNECTIONS ........................................................................................... 12
3.
1. PIN-OUT........................................................................................................................................................... 12
3.
2. A
NTENNA CONNECTOR(S) ................................................................................................................................. 16
4. HARDWARE COMMANDS.................................................................................................................................. 17
4.
1. T
4.2. I
4.3. T
URNING ON THE UC864-E/G//WD/WDU....................................................................................................... 17
NITIALIZATION AND ACTIVATION STATE .......................................................................................................... 17
URNING OFF THE UC864-E/G/WD/WDU ...................................................................................................... 20
4.3.1. Hardware Shutdown ..................................................................................................................................... 20
3.2. Hardware Unconditional Restart ................................................................................................................. 20
4.
5. POWER
5.
1. P
5.2. G
SUPPLY.................................................................................................................................................... 22
OWER SUPPLY REQUIREMENTS ........................................................................................................................ 22
ENERAL DESIGN RULES................................................................................................................................... 24
5.2.1. Electrical Design Guidelines........................................................................................................................ 24
5.2.1.1. + 5V Input Source Power Supply Design Guidelines ............................................................................................25
5.2.1.2. + 12V Input Source Power Supply Design Guidelines ..........................................................................................26
5.2.1.3. Battery Source Power Supply Design Guidelines..................................................................................................28
5.2.1.4. Battery Charge Control Circuitry Design Guidelines.............................................................................................28
5.2.2. Thermal Design Guidelines .......................................................................................................................... 30
2.3. Power Supply PCB Layout Guidelines ......................................................................................................... 32
5.
6. ANTE
6.
1. GSM/WCDMA
6.2. GSM/WCDMA
6.3. GPS
6.4. GPS
NNA(S)........................................................................................................................................................... 33
ANTENNA REQUIREMENTS....................................................................................................... 33
ANTENNA - INSTALLATION GUIDELINES .................................................................................. 34
ANTENNA REQUIREMENTS (UC864-G ONLY) ............................................................................................ 34
ANTENNA - INSTALLATION GUIDELINES (UC864-G ONLY) ....................................................................... 35
7. LOGIC LEVEL SPECIFICATIONS..................................................................................................................... 36
7.
1. R
ESET SIGNAL ................................................................................................................................................... 38
8. SERIAL PORTS ...................................................................................................................................................... 39
8.
1. M
8.2. RS232
8.3. 5V
ODEM SERIAL PORT ........................................................................................................................................ 39
LEVEL TRANSLATION ............................................................................................................................. 41
UART LEVEL TRANSLATION ....................................................................................................................... 44
9. USB PORT ............................................................................................................................................................... 47
9.
1. USB
TRANSCEIVER SPECIFICATIONS .................................................................................................................. 48
10. AUDIO SECTION OVERVIEW ....................................................................................................................... 50
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
10.1. INPUT LINES (MICROPHONE) ............................................................................................................................. 51
10.1.1. Short Description ..................................................................................................................................... 51
10.1.2. Input Line
.2. OUTPUT
10
10.2.1. Short Description ..................................................................................................................................... 52
10.2.2. Out
. GENERAL PURPOSE I/O................................................................................................................................. 54
11
11
.1. L
OGIC LEVEL SPECIFICATIONS........................................................................................................................... 56
11.2. U
11.3. U
11.4. U
11.5. U
11.6. U
11.7. U
11.8. M
SING A GPIO PAD AS INPUT ............................................................................................................................ 57
SING A GPIO PAD AS OUTPUT......................................................................................................................... 57
SING THE RF TRANSMISSION CONTROL GPIO4............................................................................................... 58
SING THE RFTXMON OUTPUT GPIO5 ........................................................................................................... 58
SING THE ALARM OUTPUT GPIO6................................................................................................................... 58
SING THE BUZZER OUTPUT GPIO7.................................................................................................................. 58
AGNETIC BUZZER CONCEPTS .......................................................................................................................... 60
11.8.1. Short Description ..................................................................................................................................... 60
11.8.2. Frequency
11.8.3. Power Supply Influe
11.8.4. Working C
.9. U
11
SING THE TEMPERATURE MONITOR FUNCTION ............................................................................................... 61
11.9.1. Short Description ..................................................................................................................................... 61
11.9.2. Allowed GPI
.10. I
11
11.11. RTC
NDICATION OF NETWORK SERVICE AVAILABILITY....................................................................................... 63
BYPASS OUT ......................................................................................................................................... 64
11.12. VAUX1
Characteristics........................................................................................................................ 51
LINES (SPEAKER)............................................................................................................................. 52
put Lines Characteristics.................................................................................................................... 53
Behavior ................................................................................................................................. 60
nce............................................................................................................................ 61
urrent Influence....................................................................................................................... 61
O .......................................................................................................................................... 61
POWER OUTPUT .............................................................................................................................. 64
- 03/02/09
12. DAC AND ADC SECTION ................................................................................................................................ 65
12
.1. DAC
CONVERTER.............................................................................................................................................. 65
12.1.1. Description............................................................................................................................................... 65
12.1.2. Enabling DAC
12.1.3. Low P
.2. ADC
12
ass Filter Example.......................................................................................................................... 66
CONVERTER.............................................................................................................................................. 66
.......................................................................................................................................... 65
12.2.1. Description............................................................................................................................................... 66
12.2.2. Using A
.3. M
12
OUNTING UC864 ON YOUR BOARD ................................................................................................................. 67
DC Converter .............................................................................................................................. 66
12.3.1. Mounting UC864-E on the Board ............................................................................................................ 67
12.3.2. Mounting UC864-G/W
12.3.3. Debug of
ACKING SYSTEM .............................................................................................................................................. 70
.4. P
12
the UC864-E/G/WD/WDU in Production................................................................................. 69
D/WDU on the Board........................................................................................... 68
13. APPLICATION GUIDE FOR SIM INTERFACE........................................................................................... 72
14
. ESD PROTECTION ........................................................................................................................................... 73
14
.1. ESD
14.2. ESD
14.3. ESD
PROTECTION FOR SIM INTERFACE ............................................................................................................. 73
PROTECTION FOR USB INTERFACE ............................................................................................................ 74
PROTECTION FOR POWER SUPPLIES ........................................................................................................... 74
15. CONFORMITY ASSESSMENT ISSUES ......................................................................................................... 75
16
. SAFETY RECOMMENDATIONS.................................................................................................................... 77
17
. DOCUMENT CHANGE LOG........................................................................................................................... 78
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/
1. Overview
The aim of this document is the description of some hardware solutions useful for
developing a product with the Telit UC864-E/G/WD/WDU module.
In this document all the basic functions of a mobile phone will be taken into account;
for each one of them a proper hardware solution will be suggested and eventually the
wrong solutions and common errors to be avoided will be evidenced. Obviously this
document cannot embrace the whole hardware solutions and products that may be
designed. The wrong solutions to be avoided must be considered as mandatory,
while the suggested hardware configurations must not be considered mandatory,
instead the information given must be used as a guide and a starting point for
properly developing your product with the Telit UC864-E/G/WD/WDU module. For
further hardware details that may not be explained in this document refer to the Telit
UC864-E/G/WD/WDU Product Description document where all the hardware
information is reported.
UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
NOTICE:
(EN) The integration of the GSM/GPRS/EGPRS/WCDMA/HSDPA UC864E/G/WD/WDU cellular module within user application must be done according to the
design rules described in this manual.
(IT) L’integrazione del modulo cellulare GSM/GPRS/EGPRS/WCDMA/HSDPA
UC864- E/G/WD/WDU all’interno dell’applicazione dell’utente dovrà rispettare le
indicazioni progettuali descritte in questo manuale.
(DE) Die Integration des UC864- E/G/WD/WDU
GSM/GPRS/EGPRS/WCDMA/HSDPA Mobilfunk-Moduls in ein Gerät muß gemäß
der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen
(SL) Integracija GSM/GPRS/EGPRS/WCDMA/HSDPA UC864- E/G/WD/WDU
modula v uporabniški aplikaciji bo morala upoštevati projektna navodila, opisana v
tem piročniku.
(SP) La utilización del modulo GSM/GPRS/EGPRS/WCDMA/HSDPA UC864E/G/WD/WDU debe ser conforme a los usos para los cuales ha sido deseñado
descritos en este manual del usuario.
(FR) L’intégration du module cellulaire GSM/GPRS/EGPRS/WCDMA/HSDPA
UC864- E/G/WD/WDU dans l’application de l’utilisateur sera faite selon les règles de
conception décrites dans ce manuel.
(HE)
The information presented in this document is believed to be accurate and reliable.
However, no responsibility is assumed by Telit Communication S.p.A. for its use, nor
any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent rights of Telit
UC864- E/G
WD/WDU
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
Communication S.p.A. other than for circuitry embodied in Telit products. This
document is subject to change without notice.
- 03/02/09
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UC864-E/G/WD/WDU Hardware User Guide
1.1. UC864-E/G/WD/WDU Product Specification
1vv0300766a Rev.4
- 03/02/09
ITEM
Air interface
Data Service
Size
Interface
Antenna
Memory
Voice
Message
FEATURE
UC864-E UC864-G UC864-WD UC864-WDU
▪ Single-Band
UMTS/HSDPA
2100MHz
▪ Quad-Band GSM
850/900/1800/1900
HSDPA UL 384kbps, DL 7.2Mbps
WCDMA UL/DL 384kbps,
EDGE UL/DL 236.8Kbps,
GPRS UL/DL 85.6 Kbps, CSD 9.6Kbps
36.2(L)X30(W)X4.8(T) 45(L)X30(W)X4.8(T)
▪ Tri-band
UMTS/HSDPA
2100/1900/850
▪ Quad-Band GSM
850/900/1800/1900
▪ Standalone GPS
▪ Dual-band
UMTS/WEDGE
2100 /900
▪ Dual-Band GSM
900/1800
▪ Dual-band
UMTS/WEDGE
1900 /850
▪ Dual-Band GSM
850/1900
WCDMA UL/DL 384kbps,
EDGE UL/DL 236.8Kbps,
GPRS UL/DL 85.6 Kbps, CSD 9.6Kbps
USB 2.0(AT command etc), 80 Pin Board to Board connector, SIM/RF connector
External Antenna
64MB SDRAM and 64MB Flash memory
Vocoder
▪
- GSM(FR/EFR/AMR) and UMTS(Static/Dynamic AMR)
▪ Supplementary Service
SMS (MO/MT)
SIM Card
Security
Internet
Protocols
Applications
Support 1.8 and 3V UICC
▪
GPRS
- Ciphering(GEA1/GEA2), Encryption(A5/1, A5/2), Authentication(PAP/CHAP)
▪ UMTS
- Encryption(UEA1), integrity UIA
▪ IMEI Security, SIM lock
▪
TCP/IP, UDP/IP, PPP protocol, V42Bis data compression
▪
SVD(Simultaneous Voice and Data)
▪ SIM PBM(Phone Book Management)
▪ FOTA (firmware Over The Air)
▪ FDN dialing number
▪ Service dialing number
▪ Enhanced operator name string
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UC864-E/G/WD/WDU Hardware User Guide
2. Mechanical Dimensions
2.1. UC864-E Mechanical Dimensions
The Telit UC864-E module overall dimensions are:
• Length: 36.2 mm
• Width: 30 mm
• Thickness: 4.8mm
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UC864-E/G/WD/WDU Hardware User Guide
2.2. UC864-G Mechanical Dimensions
The Telit UC864-G module overall dimensions are:
• Length: 45 mm
• Width: 30 mm
• Thickness: 4.8mm
1vv0300766a Rev.4
- 03/02/09
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
2.3. UC864-WD/WDU Mechanical Dimensions
The Telit UC864-WD/WDU module overall dimensions are:
• Length: 45 mm
• Width: 30 mm
• Thickness: 4.8mm
- 03/02/09
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
3. UC864-E/G/WD/WDU Module Connections
3.1. PIN-OUT
UC864-E/G/WD/WDU uses an 80 pin Molex p.n. 53949-0878 male connector for the
connections with the external applications. This connector matches the 54150-0878
models.
Pin Signal I/O Function
Power Supply
VBATT - Main power supply Power
1
VBATT - Main power supply Power
2
VBATT - Main power supply Power
3
VBATT - Main power supply Power
4
GND - Ground Power
5
GND - Ground Power
6
GND - Ground Power
7
Audio
AXE I Hands-free switching
8
EAR_HF+ AO Hands-free ear output, phase + Audio
9
EAR_HF- AO Hands-free ear output, phase - Audio
10
EAR_MT+ AO Handset earphone signal output, phase + Audio
11
EAR_MT- AO Handset earphone signal output, phase - Audio
12
MIC_HF+ AI
13
MIC_HF- AI
14
MIC_MT+ AI
15
MIC_MT- AI
16
SIMVCC - External SIM signal – Power supply for the SIM 1.8 / 3V
181
SIMRST O External SIM signal – Reset 1.8 / 3V
19
SIMIO I/O External SIM signal - Data I/O 1.8 / 3V
20
Hands-free microphone input; phase +, nominal
level 3mVrms
Hands-free microphone input; phase -, nominal
level 3mVrms
Handset microphone signal input; phase+,
nominal level 50mVrms
Handset microphone signal input; phase-,
nominal level 50mVrms
SIM Card Interface
Internal
Pull up
Audio
Audio
Audio
Audio
UC864-
E/G/WD/
CMOS
- 03/02/09
Type
WDU
2.6V
1
On this line a maximum of 10nF bypass capacitor is allowed
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Pin Signal I/O Function
SIMIN I External SIM signal - Presence (active low) 1.8 / 3V
21
SIMCLK O External SIM signal – Clock 1.8 / 3V
22
Trace
RX_TRACE I RX Data for debug monitor
23
TX_TRACE O TX Data for debug monitor
24
Prog. / Data + Hw Flow Control
C103/TXD I Serial data input (TXD) from DTE
25
C104/RXD O Serial data output to DTE
26
C107/DSR O Output for Data set ready signal (DSR) to DTE
27
C106/CTS O Output for Clear to send signal (CTS) to DTE
28
C108/DTR I
29
C125/RING O Output for Ring indicator signal (RI) to DTE
30
C105/RTS I
31
C109/DCD O
32
USB_ID AI
35
PCM_CLOCK I/O PCM clock out
36
DAC and ADC
ADC_IN1 AI Analog/Digital converter input A/D
37
ADC_IN2 AI Analog/Digital converter input A/D
38
ADC_IN3 AI Analog/Digital converter input A/D
39
DAC_OUT AO Digital/Analog converter output D/A
40
STAT_LED O Status indicator led
45
GND - Ground Ground
46
Input for Data terminal ready signal (DTR) from
DTE
Input for Request to send signal (RTS) from
DTE
Output for Data carrier detect signal (DCD) to
DTE
Miscellaneous Functions
Analog input used to sense whether a
peripheral device is connected, and
determine the peripheral type, a host
or a peripheral
Miscellaneous Functions
UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Type
Internal
Pull up
UC864-
E/G/WD/
WDU
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
Analog
CMOS
2.6V
CMOS
1.8V
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 13 of 78
Pin Signal I/O Function
Power supply for the internal USB transceiver.
AI
USB_VBUS
48
PWRMON O Power ON Monitor
49
VAUX1 - Power output for external accessories
50
CHARGE AI Charger input Power
51
CHARGE AI Charger input
52
ON/OFF I
53
RESET I Reset input
54
VRTC AO VRTC Backup capacitor Power
55
TGPIO_19 I/O Telit GPIO19 Configurable GPIO
56
TGPIO_11 I/O Telit GPIO11 Configurable GPIO
57
TGPIO_20 I/O Telit GPIO20 Configurable GPIO
58
TGPIO_04 I/O Telit GPIO4 Configurable GPIO
59
TGPIO_14 I/O Telit GPIO14 Configurable GPIO
60
TGPIO_15 I/O Telit GPIO15 Configurable GPIO
61
TGPIO_12 I/O Telit GPIO12 Configurable GPIO
62
TGPIO_10/
63
PCM_TX
TGPIO_22 I/O Telit GPIO22 Configurable GPIO
64
TGPIO_18/
65
PCM_RX
TGPIO_03 I/O Telit GPIO3 Configurable GPIO
66
TGPIO_08 I/O Telit GPIO8 Configurable GPIO
67
TGPIO_06 / I/O Telit GPIO6 Configurable GPIO / ALARM CMOS
68
This pin is configured as an analog input or an
/A
analog output depending upon the type of
O
peripheral device connected.
Input command for switching power ON or OFF
(toggle command). The pulse to be sent to the
UC864-E/G/WD/WDU must be equal or greater
than 1 second.
Telit GPIOs
Telit GPIO10 Configurable GPIO / PCM Data
I/O
Output
Telit GPIO18 Configurable GPIO / PCM Data
I/O
input
UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Type
Internal
Pull up
UC864-
E/G/WD/
WDU
47KΩ
pull-
down
1KΩ
4.4V
~5.25V
CMOS
2.6V
10KΩ
pull-
down
10KΩ
Power
Pulled up
on chip
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
1.8V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
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Pin Signal I/O Function
ALARM 2.6V
TGPIO_01 I/O Telit GPIO1 Configurable GPIO
70
TGPIO_17/
71
PCM_SYNC
TGPIO_21 I/O Telit GPIO21 Configurable GPIO
72
TGPIO_07/
73
BUZZER
TGPIO_02 I/O Telit GPIO02 I/O pin
74
TGPIO_16 I/O Telit GPIO16 Configurable GPIO
75
TGPIO_09 I/O Telit GPIO9 Configurable GPIO
76
TGPIO_13 I/O Telit GPIO13 Configurable
77
TGPIO_05/
78
RFTXMON
USB_D+ I/O USB differential Data (+)
79
USB_D- I/O USB differential Data (-)
80
17
33
34
41
42
43
44
47
69
-
-
-
-
-
-
-
I/O Telit GPIO17 Configurable GPIO / PCM Sync
I/O Telit GPIO7 Configurable GPIO / Buzzer
Telit GPIO05 Configurable GPIO / Transmitter
I/O
ON monitor
USB Interface
RESERVED
UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Type
Internal
Pull up
UC864-
E/G/WD/
WDU
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
CMOS
2.6V
3.0V
~3.6V
3.0V
~3.6V
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
NOTE: RESERVED pins must not be connected
RTS must be connected to the GND (on the module side) if flow control is not used
Note: If not used, almost all pins must be left disconnected. The only exceptions are
the following:
Pin Signal Function
1
2
3
4
5
6
7
46
25
26
31
53
54
VBATT Main power supply
VBATT Main power supply
VBATT Main power supply
VBATT Main power supply
GND Ground
GND Ground
GND Ground
GND Ground
C103/TXD Serial data input (TXD) from DTE
C104/RXD Serial data output to DTE
C105/RTS Input for Request to send signal (RTS) from DTE
ON/OFF
RESET Reset input
Input command for switching power ON or OFF
(toggle command).
- 03/02/09
3.2. Antenna Connector(s)
The UC864-E/G/WD/WDU module is equipped with a 50 Ohm RF connector from
Murata, GSC type P/N MM9329-2700B for GSM/WCDMA antenna connection. This
connector is located on front side next to 80 pin Molex connector.
The counterpart suitable is Murata MXTK92 Type or MXTK88 Type.
The UC864-G module is also equipped with an additional 50 Ohm RF connector from
Murata, GSC type P/N MM9329-2700B for GPS antenna connection. This connector
is located on the rear side.
The counterpart suitable is a Murata MXTK92 Type or MXTK88 Type.
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
4. Hardware Commands
4.1. Turning ON the UC864-E/G/WD/WDU
To turn on UC864-E/G/WD/WDU, the pad ON# must be tied low for at least 1 second
and then released.
The maximum current that can be drained from the ON# pad is 0,1 mA.
A simple circuit to do it is:
- 03/02/09
ON#
R1
Power ON impulse
R2
4.2. Initialization and Activation state
Upon turning on UC864-E/G/WD/WDU, UC864-E/G/WD/WDU is not activated yet
because the boot sequence of UC864-E/G/WD/WDU is still going on internally. It
takes about 6.5 seconds to complete the initializing the module internally.
For this reason, it would be useless to try to access UC864-E/G/WD/WDU during a
Initialization state as below. To get stability, UC864-E/G/WD/WDU needs at least 6.5
seconds after the PWRMON goes High
Q1
GND
2.27ms
1 sec (at least)
6.5 sec
Initialization state Activation state
ON/OFF
PWRMON
Internal state
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UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
During the Initialization state, any kind of AT-command is not available. DTE must be
waiting for the Activation state to communicate with UC864-E/G/WD/WDU.
- 03/02/09
NOTE:
To check if the UC864-E/G/WD/WDU has powered on, the hardware line PWRMON
must be monitored. When PWRMON goes high, the module has powered on.
NOTE:
Do not use any pull up resistor on the ON# line, it is internally pulled up. Using pull up
resistor may bring to latch up problems on the UC864-E/G/WD/WDU power regulator
and improper power on/off of the module. The line ON# must be connected only in
open collector configuration.
NOTE:
In this document all the lines are inverted. Active low signals are labeled with a name
that ends with a "#" or with a bar over the name.
NOTE:
UC864-E/G/WD/WDU turns fully on also by supplying power to the Charge pad
(provided there is a battery on the VBATT pads).
NOTE:
UC864-E version also turns fully on by supplying power to the USB_VBUS pin
(provided there is a battery on the VBATT pads). Care must be taken to avoid
supplying power to the USB_VBUS pin before the module turns on. To check if the
UC864-E has powered on, the hardware line PWRMON must be monitored. When
PWRMON goes high, the module has powered on.
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For example:
1- Let us assume you need to drive the ON# pad with a totem pole output of a
+1.8/5 V microcontroller (uP_OUT1):
10k
1.8 / 5V
- 03/02/09
1s
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4.3. Turning OFF the UC864-E/G/WD/WDU
Turning off the device can be done in three ways:
• by software command (see UC864-E/G/WD/WDU Software User Guide)
• by hardware shutdown
• by Hardware Unconditional Restart
When the device is shut down by software command or by hardware shutdown, it
issues to the network a detach request that informs the network that the device will
not be reachable any more.
4.3.1. Hardware Shutdown
To turn OFF UC864-E/G/WD/WDU the pad ON# must be tied low for at least 2
seconds and then released. Same circuitry and timing for the power on must be used.
- 03/02/09
The device shuts down after the release of the ON# pad.
NOTE:
To turn OFF UC864-E version, first of all, you MUST cut off the supplying power to
the USB_VBUS, or the module does not turn off.
TIP:
To check if the device has powered off, hardware line PWRMON must be monitored.
When PWRMON goes low, the device has powered off.
4.3.2. Hardware Unconditional Restart
To unconditionally restart UC864-E/G/WD/WDU, the pad RESET# must be tied low
for at least 200 milliseconds and then released.
A simple circuit to do it is:
Unconditional Restart
impulse
RESET#
GND
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NOTE:
Do not use any pull up resistor on the RESET# line or any totem pole digital output.
Using pull up resistor may bring to latch up problems on the UC864-E/G/WD/WDU
power regulator and improper functioning of the module. The line RESET# must be
connected only in open collector configuration.
TIP:
The unconditional hardware Restart must always be implemented on the boards and
the software must use it as an emergency exit procedure.
For example:
1- Let us assume you need to drive the RESET# pad with a totem pole output of a
+1.8/5 V microcontroller (uP_OUT2):
- 03/02/09
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10k
+1.8 / 5V
- 03/02/09
5. Power Supply
The power supply circuitry and board layout are a very important part in the full
product design and they strongly reflect on the product overall performances. Read
carefully the requirements and the guidelines that will follow for a proper design.
5.1. Power Supply Requirements
The UC864-E/G/WD/WDU power requirements are:
Power Supply
Nominal Supply Voltage 3.8V
Max Supply Voltage 4.2V
Supply Voltage Range 3.4V – 4.2V
UC864-E/G/WD/WDU
Mode Average(mA) Mode Description
IDLE mode with GPS OFF
AT+CFUN=1
AT+CFUN=4
WCDMA 22.0
GSM 15.0
WCDMA 17.8
GSM 17.8
Stand by mode; no call in progress; GPS OFF (in
UC864-G)
Normal mode; full functionality of the module
Disabled TX and RX; modules is not registered on the
network
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Power saving; CFUN=0 module registered on the
WCDMA 4.1 / 1.3*
AT+CFUN=0 or
AT+CFUN=5
GSM 3.3 / 1.3*
WCDMA TX and RX mode with GPS OFF GPS OFF in UC864-G
WCDMA Voice 690 WCDMA voice channel
WCDMA data 680 WCDMA data channel
HSDPA 730 HSDPA data channel (HSDPA for UC864-E/G only)
GSM TX and RX mode with GPS OFF GPS OFF in UC864-G
GSM Voice 320 GSM voice channel
GPRS Class12 790 GPRS data channel
EDGE Class12 560 EDGE data channel
* Worst/best case depends on network configuration and is not under module control.
network and can receive voice call or an SMS; but it is
not possible to send AT commands; module wakes up
with an unsolicited code (call or SMS) or rising RTS
line.
CFN=5 full functionality with power saving;
Module registered on the network can receive
incoming call sand SMS
- 03/02/09
NOTE:
UC864-E version cannot be put in saving mode if USB_VBUS is connected, first of
all, you MUST cut off the supplying power to the USB_VBUS, or the module will not
go in power saving mode.
UC864-G only
Mode Average(mA) Mode Description
IDLE mode with GPS ON full power mode*
AT+CFUN=1
AT+CFUN=4
WCDMA TX and RX mode with GPS ON full
WCDMA Voice 785 WCDMA voice channel
WCDMA 117
GSM 113
WCDMA 109
GSM 109
power mode*
Stand by mode; no call in progress; GPS ON
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WCDMA 775 WCDMA data channel
HSDPA 825 HSDPA data channel
GSM TX and RX mode with GPS ON full
power mode*
GSM Voice 410 GSM voice channel
GPRS Class12 880 GPRS data channel
EDGE Class12 650 EDGE data channel
* except external active GPS antenna
In GSM/GPRS mode, RF transmission is not continuous and it is packed into bursts
at a base frequency of about 216 Hz, and the relative current peaks can be as high
as about 2A. Therefore the power supply has to be designed in order to withstand
these current peaks without big voltage drops; this means that both the electrical
design and the board layout must be designed for this current flow. If the layout of the
PCB is not well designed, a strong noise floor is generated on the ground; this will
reflect on all the audio paths producing an audible annoying noise at 216 Hz; if the
voltage drops during the peak, current absorption is too much. The device may even
shut down as a consequence of the supply voltage drop.
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TIP:
The electrical design for the Power supply must be made ensuring that it will be
capable of a peak current output of at least 2A.
5.2. General Design Rules
The principal guidelines for the Power Supply Design embrace three different design
steps:
• the electrical design
• the thermal design
• the PCB layout
5.2.1. Electrical Design Guidelines
The electrical design of the power supply depends strongly on the power source
where this power is drained. We will distinguish them into three categories:
• +5V input (typically PC internal regulator output)
• +12V input (typically automotive)
• battery
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