RoyalTek REB-4315 Quick start guide

REB-4315 Operational Manual
REB-4315 Operational Manual
Version 0.2
2010/09/23
This document contains information highly confidential to RoyalTek Company LTD
(RoyalTek). It is provided for the sole purpose of the business discussions between customer
and RoyalTek and is covered under the terms of the applicable Non-Disclosure Agreements.
Disclosure of this information to other parties is prohibited without the written consent of
RoyalTek.
Prepared by RoyalTek Company LTD.
4F., No.188, Wen Hwa 2nd Rd., Kuei Shan,
Tao Yuan 333, Taiwan
TEL: [phone]
FAX: [phone]
contact sales: http://www.royaltek.com/contact

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REB-4315 Operational Manual
Content
1. Introduction...........................................................................................................2
1.1 Product Applications.....................................................................................2
2. Product Pictures ...................................................................................................3
3. REB-4315 Block Diagram.....................................................................................3
4. REB-4315 Technical Specification.........................................................................4
5. Reference schematic:...........................................................................................5
6. Power Design Consideration ................................................................................6
7. Recommend layout PAD:......................................................................................7
8. Mechanical diagram .............................................................................................8
9. Interface document...............................................................................................9
10. Software Interface................................................................................................12
11. Package Specification and Order Information ......................................................16
12. Contact Royaltek..................................................................................................17
Revision History .........................................................................................................17

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1 Introduction
RoyalTek REB-4315 is the newest generation of RoyalTek GPS module. The module is
powered by latest SiRF Star IV chip and RoyalTek proprietary navigation technology that
provides you with stable and accurate navigation data. SiRF Star IV is the high sensitivity
navigation engine tracks as low as -163dBm. The smallest form factor and miniature design is
the best choice to be embedded in a device such as portable navigation device, personal
locator, speed camera detector and vehicle locator.
Product Features
48 track verification channels
Power supply 1.8 volts
SMT type with stamp holes
Small form factor with embedded SiRF Star IV technology.
Removes in-band jammers up to 80 dB-Hz, track up to 8 CW jammers
Embedded InstantFix CGEE and Reverse CGEE(3 days)
Enhanced algorithm for navigation stability
Excellent sensitivity for urban canyon and foliage environments.
1.1 Product Applications
Automotive navigation
Personal positioning and navigation
Mobile gaming
Cameras
Asset Tracking
Others location-aware consumer devices

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2 Product Pictures
3 REB-4315 Block Diagram
System block diagram description:
a. External antenna.
b. 16 Mega bits flash memory
c. 22 pin I/O pins
Pin 1

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4 REB-4315 Technical Specification
Impedance：50Ω
No Function Specification
GPS receiver
1 Chipset SiRF Star IV, GSD4e
2 Frequency L1 1575.42MHz.
3 Code C.A. Code.
4 Channels 48 track verification channels
5 Sensitivity (Acquisition) It shall show C/No ≧40 dB-Hz when external power
= -130dBm.
6 Cold start 35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
7 Warm start 35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
8 Hot start 1 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
9 Reacquisition 0.1sec typical
10 Position accuracy 2.5meters(50% 24hr static, -130dBm)
11 Maximum altitude 18288 m
12 Maximum velocity 514 m/s
13 Update rate 1Hz
14 Protocol setup NMEA0183 standard V3.01 and
backward compliance-Adjustable by firmware
Interface
15 I/O Pin 22pins
Power consumption
16 Vcc DC 1.8v(Max. 1.89v)
17 Current GPS :
Typ.52mA@1.8V(Avg Acquisition w/o ext. Antenna)
Typ.41mA@1.8V(Avg Tracking w/o ext. Antenna)
18 Hibernate Mode T[email protected](Average w/o ext. Antenna)
Mechanical requirements
19 Dimension(mm) 13*15*2.2
20 Weight ≦3g
Environment
21 Operating temperature -30 ~ 85℃
22 Humidity ≦95%

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5 Reference schematic:
For example:
Note:
(1) Ground Planes:
These pin(8、18、20、21、22) should be connect to ground.
(2) Serial Interface:
(Ⅰ)The TX pin is the serial output data.<UART data transmit (TX)>
(Ⅲ)The RX pin is the serial input data.< UART data receive (RX)>
(3) RF_IN:
Connecting to the antenna has to be routed on the PCB. The transmission line must
to be control impedance from RF_IN pin to the antenna or antenna connector of
your choice. (Impedance 50Ω)
Recommend used Active antenna (Gain 27).
(4) Power:
Connect VCC_IN_1V8 pin to DC 1.8V. The power supply must add bypass
capacitor(10uF and 1uF).It can reduce the Noise from power supply and increase
power stability.
Shutdown
Shutdown the REB-4315 module, don’t remove the Vcc_IN_1V8 Pin, must be
use on/off pulse make it into Hibernate mode.(It’s will keep the Warm start
and Hot start function work well)
(5) nRESET：
External reset input with internal pull-up, active low.
(6) ON/OFF：

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Input pulse is required to start the system, and switch the operation mode to
full-power mode or Hibernate mode.
(7) Wakeup：
Wakeup output indicate the chip states, when chip is working the output is high
level.
Wakeup output can control or enable the external regulator.(Ex. To control
external antenna power)
(8) Boot
Set this pin to high for programming flash.
Normal operation mode it is set to low voltage.
6 Power Design Consideration
Start the REB-4315(GSD4e)
After supply the 1.8v to the P12 VCC_IN_1V8,the REB-4315(GSD4e) awaits a pulse to
the ON_OFF input to start.
Switching to Hibernate State
By ON_OFF:assert an ON_OFF pulse when receiver is in full-power mode
Awakening from hibernate state
When the system is in simple hibernate state, an ON_OFF input pulse is required to start
the system.
Requirements:
‧The REB-4315(GSD4e) is intended to be used with an always-ON, single voltage supply of
1.8V
‧The REB-4315(GSD4e) requires an orderly shut-down process to properly stop internal
operation and complete any writes of critical data to BBRAM, EEPROM, or Flash memory
data area (if those functions are in use).
Cautions:
‧Abrupt removal or droop of main power while the system is running has risks ranging from
fatal corruption of flash memory code area with BGA parts to minor impact on TTFF from lost
data.
‧Complete removal of 1.8V even after orderly shutdown, will have performance
consequences

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7 Recommend layout PAD:
Dimension：13mm*15mm*2.2mm(Tolerance：±0.2mm)
TOP View
Recommend paste mask pad
Recommend paste mask pad is shift outside the layout pad 0.2mm (See under figure)
Black Block is layout PAD、Blue Block(Gray region is paste mask pad recommend)

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TOP View
8 Mechanical diagram

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9 Interface document
Top View
Pin defined:
Pin
No. Name Input/
Output Description Characteristics
1 NC Non connect
2 NC Non connect
3 PPS Output
TM Time mark output.
Output pulse timing.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
4 TX Output UART data transmit.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
5 RX Input UART data receive.
Vil ：-0.4v~0.45v
Vih ：1.26v~3.6v
(CMOS I/O run from 1.8v)
6 GPIO-3 Reserved Reserved.
7 EI2/GPIO-8 Reserved Reserved.
8 GND Ground