NimbeLink Skywire RL78 User manual

Skywire® RL78/Kurumi Adapter
User Manual
NimbeLink Corp
Updated: October 2017
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 1

Table of Contents
Table of Contents 2
Introduction 3
Product Overview 3
Orderable Part Numbers 3
Additional Resources 3
Device Overview 4
Technical Specifications 5
Electrical Specifications 5
Operating Parameters 5
Power 5
Connection Descriptions 6
Operating Modes 7
RL78/G13 Demonstration Kit PMOD Adapter 7
About 7
Block Diagram 7
Switch Configuration 8
Connections 8
SPI to UART Chip Configurations 8
Board Orientation 9
Renesas Kurumi Adapter 9
About 9
Block Diagram 10
Switch Configuration 10
Connections 11
Board Orientation 11
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 2

1. Introduction
1.1 Product Overview
This document is the Hardware Reference Manual for the Skywire® RL78/Kurumi
Adapter. The Skywire RL78/Kurumi Adapter is designed to provide robust cellular
connectivity for the Renesas RL78/G13 Demonstration Kit and the Renesas Kurumi.
The Skywire Cellular Modem at the heart of this adapter connects your M2M
device to the Internet of things without the costs, delays, and hassles of federal
and carrier certifications.
The NimbeLink Skywire modem is available with bundled data plans from leading
cellular carriers.
1.2 Orderable Part Numbers
Orderable Device
Description
Manufacturer
Carrier
Networ
k Type
NL-AB-RL78
Skywire RL78/Kurumi Adapter Board
NimbeLink
NL-SW-1xRTT-V
Skywire 1xRTT Cellular Modem without data plan.
2G Modem.
NimbeLink
Verizon
CDMA
1xRTT
TG.30.8113
Primary & Diversity Cellular Antenna
Taoglas
NL-SW-EVDO-V
Skywire EVDO Cellular Modem without Data plan.
3G Modem.
NimbeLink
Verizon
CDMA
1xRTT
MA.301.A.AB.001
3G Primary Antenna. GPS/GLONASS Antenna for
Skywire EVDO*
Taoglas
1.3 Additional Resources
● NimbeLink's Skywire2G 1xRTT Product Page
● NimbeLink's Skywire 3G CDMA/EVDO Product Page
● Telit’s CE910 Hardware User Guide
● Telit’s DE910 Hardware User Guide
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 3

1.4 Device Overview
Top Side
Bottom Side
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2. Technical Specifications
2.1 Electrical Specifications
2.1.1 Operating Parameters
Parameter
Value
Unit
Skywire UART Baud Rate
115200
bps
Skywire I/O Voltage
1.65-5.5
V
Skywire Power Consumption, Active Cell
750
mA
Normal
29
mA
Power Saving
1.1
mA
Skywire Input Voltage
4
V
J1 Input Voltage
5
V
PMOD Input Voltage
3.3
V
PMOD I/O Voltage
3.3
V
Kurumi Input Voltage
4
V
Temperature Range
-40 to +85oC
oC
Dimensions
47 x 82 x 25
mm
2.2 Power
The Skywire RL78/Kurumi Adapter requires 5V and 3.3V inputs. Connector J1
accepts 5V input voltage and is used to supply power to the Skywire 4V Power
Supply. The acceptable input Voltage range for J1 is 4.8-5.2V. Do not exceed
5.5V.
The Skywire Cellular Modem will regularly consume high amounts of current
(~750 mA) from the adapters power supply. It is recommended to have 1A of
available source current available for the adapter board.
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 5

2.3 Connection Descriptions
Designator
Description
SW1
Mode Selection Switch
J1
5V Power IN, Barrel Jack
J2
Skywire Breakout Header
J3
Skywire Breakout Header
J4
PMOD Connector
J5
Current Test Point
J6
Skywire Breakout Header
J7
Renesas Kurumi Breakout Header
J8
Renesas Kurumi Breakout Header
J9
Renesas Kurumi Programming Header
U4
Renesas Kurumi Socket
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3. Operating Modes
3.1 RL78/G13 Demonstration Kit PMOD Adapter
3.1.1 About
The PMOD interface on the Skywire RL78-Kurumi Adapter adheres to the
Digilent PMOD specifications for Type 2A (Expanded SPI) PMOD Interface with
a standard twelve-pin connector.
The PMOD interface connects to the Renesas Demonstration Kit for the
RL78/G13 (YRDKRL78G13) through the PMOD2 connector. The adapter’s
onboard SPI to UART converter provides protocol translation allowing for the
demonstrations kits Type 2A (Expanded SPI) PMOD Interface to communicate
with the Skywire module.
3.1.2 Block Diagram
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 7

3.1.3 Switch Configuration
SW1 is used to control the configuration mode of the adapter. To configure the
adapter for use with the PMOD connection do the following:
1. Remove power from J1 and the PMOD connection.
2. Place SW1.1-SW1.5 in the on position.
3. Place SW1.6 in the off position.
4. Configuration complete.
3.1.4 Connections
The Skywire RL78-Kurumi Adapter connects to the RL78/G13 through a Type 2A
(Expanded SPI) PMOD Interface. The table below describes the connections.
PIN
Signal
Description
1
SS
Slave Select. Active low to enable slave device
2
MOSI
Master Out Slave In. Data from master to slave
3
MISO
Master In Slave Out. Data from slave to master
4
SCK
Serial clock. Master provides the clock to shift the data
5
GND
6
VCC
7
INT
Interrupt signal from slave to master, connected to the SPI to
UART converter chip
8
RESET
Reset signal for master to reset SPI to UART converter
9
Skywire ON/OFF
Skywire On Off control line
10
Skywire DTR
Skywire DTR signal
11
GND
12
VCC
3.1.5 SPI to UART Chip Configurations
To configure the XR20M1170 SPI to UART interface for communication between the
PMOD interface (SPI) and the Skywire Cellular Modem (UART, 115200 bps) use the
configuration sequence in the table below. The SPI interface from the host processor
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should be configured to SPI MODE0, most Significant bit first, and the clocking rate must
be 16 MHz or lower.
Configuration Step
Register
Register Address
Value
Notes
1
LCR
0x03
0xBF
Configure LCR for EFR write
2
EFR
0x02
0x10
Configure EFR
3
LCR
0x03
0xB0
Configure LCR for Baud rate config
4
DLL
0x00
0x08
Configure baud rate for 115200 bps
5
DLM
0x01
0x00
Configure baud rate for 115200 bps
6
DLD
0x02
0x00
Configure baud rate for 115200 bps
7
MCR
0x04
0x03
Configure clock prescaler
8
LCR
0x03
0xBF
Write LCR for EFR write
9
EFR
0x02
0x00
Disable config mode
10
LCR
0x03
0x03
Reset LCR for operation mode
11
LCR
0x02
0x07
Enable and clear FIFOs
3.1.6 Board Orientation
The adapter should be connected to the RL78/G13 Demonstration kit with the
Skywire modem facing towards the demonstration kit as shown below or with a
right angle adaptor with the Skywire Modem facing upwards.
3.2 Renesas Kurumi Adapter
3.2.1 About
The Renesas Kurumi interface on the Skywire RL78-Kurumi Adapter provides a
UART connection between the two boards.
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 9

3.2.2 Block Diagram
3.2.3 Switch Configuration
SW1 is used to control the configuration mode of the adapter. To configure the
adapter for use with the Renesas Kurumi do the following:
1. Remove power from J1 and the PMOD connection.
2. Place SW1.1-SW1.5 in the off position.
3. Place SW1.6 in the on position.
4. Configuration complete.
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3.2.4 Connections
The following table shows the connections between the NimbeLink Skywire
Cellular Modem and the Renesas Kurumi.
Kurumi
Pin
Signal
Description
2
Skywire DTR
Skywire Data Terminal Ready Signal
4
Skywire On Off
Skywire On/Off control line
5
Skywire CTS
Skywire Clear to Send
6
Skywire RTS
Skywire Ready to Send
7
Skywire DIN
Skywire UART data in
8
Skywire DOUT
Skywire UART data out
3.2.5 Board Orientation
The Renesas Kurumi board should be attached with the programming header aligned
with the programming header breakout pins(J9) on the adapter board.
PN 30018 rev 2© NimbeLink Corp. 2017. All rights reserved. 11