Microchip Technology BM78ABCDEFGH User Manual
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BM78SPPS5MC2,RN4678
Bluetooth® 4.0 Dual mode Module
Features:
•
Bluetooth Classic (BR/EDR) and Low
Energy (LE)
•
Complete , Fully Certified, Embedded 2.4
GHz Bluetooth® Version 4.0 IC
•
Bluetooth SIG Certified
•
Transparent UART mode for seamless
serial data over UART interface
•
Easy to configure with Windows GUI or
direct by MCU
•
Firmware can be field upgradable via UART
•
Compact surface mount module: 22 x 12 x
2.4 mm
•
Castellated surface mount pads for easy
and reliable host PCB mounting
•
Perfect for Portable Battery Operated
Devices
•
Internal Battery Regulator Circuitry
•
Worldwide regulatory certifications
•
1 LED and it has 16 steps Brightness.
Operational:
•
Single operating voltage: 3.2V to 4.3V
Data Throughput:
•
11k bps (BR/EDR)@ UART baud Rate is 115200
bps
•
8 Kbps (LE) UART baud Rate is 115200 bps
MAC/Baseband/Higher Layer:
•
Secure AES128 encryption
•
BTv3.0: GAP, SPP, SDP, RFCOMM and L2CAP
•
BTv4.0: GAP, GATT, ATT, SMP and L2CAP.
FIGURE 1: BM78 TOP VIEW
•
Temperature range: -20℃ to 70℃
Industrial
•
Simple, UART interface
•
Integrated crystal, internal voltage
regulator, and matching circuitry
•
Multiple I/O pins for control and status
RF/Analog:
•
Frequency: 2.402 to 2.480 GHz
•
Receive Sensitivity: -90 dBm (BR/EDR); -92
dBm (LE)
•
Power Output: +2 dBm (typ.)
2015 Microchip Technology Inc.
General Description:
The BM78 is a fully-certified Bluetooth®
Version 4.0 (BR/EDR/LE) IC for designers who
want to easily add dual mode Bluetooth®
wireless capability to their products.
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Delivering local connectivity for the
Internet of Things (IoT), the IC bridges your
product to Smart Phones and Tablets for
convenient data transfer, control and
access to cloud applications.
It supports GAP, SDP, SPP, and GATT
profiles. Data is transferred over the
Bluetooth link by sending/receiving data
via transparent UART mode, making it easy
to integrate with any processor or
Microcontroller with a UART interface.
Configuration is made easy using a
Windows® based GUI or directly via UART
by a MCU
Applications:
•
Mobile Point of Sales (mPOS)
•
LED lighting (16 step)
•
Wearables
•
Digital Sports
•
Fitness Devices
•
Health Care/ Medical
•
Automotive Accessories
•
Home Automation
•
Remote Control Toys
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BM78SPPS5M
C2
, RN4678
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at docerrors@microchip.com. We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page. The
last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
Microchip’s Worldwide Web site; http://www.microchip.com
Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.
TO OUR VALUED CUSTOMERS
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BM78SPPS5M
C2
, RN4678
Device
Antenna
Shield
Regulatory
Ce
rtifications
BM7
8
SPPS
5NC2 Integral
ceramic chip
Yes FCC,
IC, CE, KCC,
NCC,
Japan
BM7
8
SPP0
5NC2
External
No NO
1.0 DEVICE OVERVIEW
The BM78 is a complete, fully certified, embedded 2.4 GHz Bluetooth® version 4.0
(BR/EDR/LE) wireless IC. It incorporates an on-board Bluetooth stack, cryptographic accelerator,
power management subsystem, 2.4 GHz transceiver, and RF power amplifier (see Figure 1). With
the BM78, designers can embed Bluetooth functionality rapidly into virtually any device.
The BM78 provides cost and time-to-market savings as a self-contained Bluetooth solution.
The IC has been designed to provide integrators with a simple Bluetooth solution that features:
• Ease of integration and programming
• Vastly reduced development time
• Minimum system cost
• Interoperability with Bluetooth hosts
• Maximum value in a range of applications
The BM78 can independently maintain a low-power wireless connection. Low-power usage
and flexible power management maximize the IC’s lifetime in battery-operated devices. A wide
operating temperature range allows use in indoor and outdoor environments (industrial
temperature range).
The BM78 module comes in two varieties. The BM78SPPS3MC2 is a complete, fully
regulatory certified module with integral ceramic chip antenna and shield. The BM78SPP03MC2 is
a lower cost alternative with external antenna and no shield. The integrator is responsible for the
antenna, antenna matching, and regulatory certifications.
The BM78 is a small, compact, surface mount module with castellated pads for easy and
reliable host PCB mounting. The module is compatible with standard pick-and-place equipment.
TABLE 1‐1: BM78 MODULE FAMILY TYPES
FIGURE 1: Block Diagram
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BM78SPPS5M
C2
, RN4678
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BM78SPPS5M
C2
, RN4678
FIGURE 1‐2: BM78SPPS5NC2 PIN DIAGRAM
FIGURE 1‐3: BM78SPP05NC2 PIN DIAGRAM
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BM78SPPS5MC2 , RN4678
2 -- GND
Power
Ground reference
Connect to 10
uF (X5R/X7R)
capacitor.
Connect to 10
uF (X5R/X7R)
capacitor.
Ensure VDD_IO and MCU I/O voltages are compatible.
(internal pull-up)
Connect to 1
uF (X5R/X7R)
capacitor.
BM78
State indication , refer to P1
_5
B
luetooth link status indication
13 11 P1_2/SCL
DO
I2C SCL (Do Not Connect)
14 12 P1_3/SDA
DIO I2C SDA (Do Not Connect)
16 14 P0_5 DIO Configurable Control or Indication pin
18 16 P2_0 DI System configuration (internal pull-up)
20 18 EAN DI System configuration (internal pull-down)
22 20 RXD DI UART data input
23 21 TXD DO UART data output
(when configured as input: internal pull-up)
(when configured as input: internal pull-up)
TABLE 1‐1: PIN DESCRIPTION
S5
pin
03
pin
Symbol Type Description
1 -- GND Power Ground reference
3 1 GND Power Ground reference
4 2 BAT_IN Power Battery Input. Main positive supply input.
5 3 SW_BTN DI Software Button H: Power On / L: Power Off
6 4 LDO33_O Power Internal 3.3V LDO regulator output.
7 5 VDD_IO Power
I/O positive supply input.
8 6 LDO18_O Power Internal 1.8V LDO regulator output.
Connect to 10uF (X5R/X7R) capacitor.
9 7 WAKEUP DI Wakeup from shutdown mode (active low)
10 8 PMULDO_O Power Power management unit output.
11 9 P0_4 DO UART_TX_IND:
H: BM78 indicate UART data will be transmitted out
after certain timing.
(Setting by UI@ “MCU setting”, default wait 5ms)*1
L: Otherwise.
STATUS_IND_2:
12 10 P1_5 DO STATUS_IND:
15 13 P1_7/CTS DIO Configurable Control or Indication pin or
UART CTS (input)
17 15 P0_0/RTS DIO Configurable Control or Indication pin or
19 17 P2_4 DI System configuration (internal pull-up)
21 19 RST_N DI Module reset (active low) (internal pull-up)
24 22 P3_1 DIO Configurable Control or Indication pin
25 23 P3_2 DIO Configurable Control or Indication pin
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UART RTS (output)
Apply a pulse of at least 63 ns.
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BM78SPPS5MC2 , RN4678
(when configured as input: internal pull-up)
31 29 GND
Power
Ground reference
-- 30
BT_RF
AIO External antenna
connection (50 ohm)
33 -- GND
Power
Ground reference
26 24 P3_3 DIO Configurable Control or Indication pin
(when configured as input: internal pull-up)
27 25 P3_4 DIO Configurable Control or Indication pin
(when configured as input: internal pull-up)
28 26 P3_6 DIO (Do Not Connect)
29 27 P3_7 DIO Configurable Control or Indication pin
30 28 LED1 DO Status LED
32 -- GND Power Ground reference
Note 1: Pin type abbreviation: A = Analog, D = Digital, I = Input, O = Output.
UI setting:
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1.1 Power Tree
Figures 2-1 : Power Tree
1.2 UART Interface
Figures 2-2 : Power and MCU interface examples.
Figure 2‐2 shows an example power scheme using a 3.3 volt to MCU VDD. Battery power is
applied to BAT_IN pin. From the LDO33_O pin, voltage can be routed the VDD_IO pin and external
circuitry including the MCU. This power scheme ensures that BM78 and MCU I/O voltages are
compatible.
CAUTION: The internal 3.3volt LDO current source: 50mA maximum!!
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BM78SPPS5MC2 , RN4678
2.0 Bluetooth behavior auto/manual pattern configuration
Power ON
Enabled
Auto Pattern Setting
Disabled
2.1 auto pattern
Configure Mode
Auto Pattern
Manual Pattern
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BM78SPPS5MC2 , RN4678
Standby mode
Pairing Procedure
Access State
Link state Connected mode
Shutdown state Shutdown mode
2.2 Manual pattern
Configure mode
Link back mode
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2.3 UI setting
NOTE: Please reference
“Application Note_IS1678S_Draft.docx” and “IS1678S Command Set v0
97 20140924.docx.”
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BM78SPPS5MC2 , RN4678
P0_0
■
P0_5
■
P1_7
■
P3_1
■
P3_2
■
P3_3
■
P3_4
■
P3_7
■
3.0 Control and Indication I/O Pins
I/O pins P0_0, P0_5, P1_7, P3_1, P3_2, P3_3, P3_4 and P3_7 are configurable control and
indication I/O. Control signals are input to the BM78. Indication signals are output from the BM78.
Table 4‐1 shows configurable I/O pin assignment to control and indication signals.
Note: that RTS can only be assigned to P0_0 and CTS is assigned to P1_7.
Configuring the BM78 can reference the “Application Note_IS1678S_Draft.docx” and
“IS1678S Command Set v0 97 20140924.docx.”
TABLE 3‐1: CONFIGURATION AND INDICATION I/O ASSIGNMENTS
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BM78SPPS5MC2 , RN4678
3.1 UI setting
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