Preliminary Datasheet BM77SPPx3MC2 (Microchip) - 6
| Manufacturer | Microchip |
| Description | Bluetooth 4.0 Dual Mode Module |
| Pages / Page | 28 / 6 — BM77SPPx3MC2 |
| File Format / Size | PDF / 741 Kb |
| Document Language | English |
BM77SPPx3MC2
Model Line for this Datasheet
- BM77SPP03MC2-0003AA BM77SPP03MC2-0004AA BM77SPP03MC2-0006AA BM77SPP03MC2-0007AA BM77SPP03MC2-0008AA BM77SPP03MC2-0009AA BM77SPP03MC2-000AAA BM77SPP03MC2-000BAA BM77SPP05MC2-0006AA BM77SPPS3MC2-0006AA BM77SPPS3MC2-0007AA BM77SPPS3MC2-0008AA BM77SPPS3MC2-000AAA BM77SPPS3MC2-PH07AA BM77SPPS3MC2-S00AAA BM77SPPS5MC2-0004AA
Text Version of Document
BM77SPPx3MC2
The Software Button (SW_BTN) input pin powers the BM77 on (high) or off (low) 1.7 WAKE UP (WAKEUP) The Wake Up (WAKEUP) input pin wakes the BM77 from shutdown mode (active low). 1.8 RESET (RST_N) The Reset (RST_N) input pin resets the BM77 (active low pulse for at least 63 ns). 1.9 Status LED (LED1) The status LED (LED1) indicates:
• Standby
• Inquiry
• Link
• Link Back
• Low Battery
• Page
Each indication is a configurable flashing sequence. LED brightness can also be configured. 1.10 System Configuration I/O pins P20, P24, and EAN place the BM77 into operation modes as shown in Table 1-4. P20 and P24
each have internal pull-ups. EAN has internal pull-down.
TABLE 1-4:
P20
High
Low
Low SYSTEM CONFIGURATION SETTINGS
P24
EAN
Operational Mode
High
Low
Normal operation
High
Low
Test (Write EEPROM)
Low
High
Write Flash (Firmware programming) 1.11 Power Figure 1-4 shows an example power scheme using a 3.3 volt low-dropout (LDO) regulator supplying 3.3
volts to both the BM77 (BAT_IN and VDD_IO) and MCU VDD. This power scheme ensures that BM77
and MCU I/O voltages are compatible.
Figure 1-5 shows an example power scheme using a 3.7 volt lithium-ion battery. The BM77 has an
internal 3.3 volt LDO regulator. Battery power is applied to BAT_IN pin. The regulated 3.3 volts output
is on the LDO33_O 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 BM77 and MCU I/O voltages are
compatible.
CAUTION: The internal 3.3 volt LDO current source: 50 mA maximum
Recommended bypass capacitor location and values are shown in Figures 1-4 and 1-5. Capacitors can be
low ESR ceramic. Place capacitors close to BM77 module. FIGURE 1-4: BM77 TO MCU INTERFACE EXAMPLE – LDO © 2014 ISSC Technologies Corp. Preliminary Revision 2.1.1 – June 16, 2015 Page 6
The Software Button (SW_BTN) input pin powers the BM77 on (high) or off (low) 1.7 WAKE UP (WAKEUP) The Wake Up (WAKEUP) input pin wakes the BM77 from shutdown mode (active low). 1.8 RESET (RST_N) The Reset (RST_N) input pin resets the BM77 (active low pulse for at least 63 ns). 1.9 Status LED (LED1) The status LED (LED1) indicates:
• Standby
• Inquiry
• Link
• Link Back
• Low Battery
• Page
Each indication is a configurable flashing sequence. LED brightness can also be configured. 1.10 System Configuration I/O pins P20, P24, and EAN place the BM77 into operation modes as shown in Table 1-4. P20 and P24
each have internal pull-ups. EAN has internal pull-down.
TABLE 1-4:
P20
High
Low
Low SYSTEM CONFIGURATION SETTINGS
P24
EAN
Operational Mode
High
Low
Normal operation
High
Low
Test (Write EEPROM)
Low
High
Write Flash (Firmware programming) 1.11 Power Figure 1-4 shows an example power scheme using a 3.3 volt low-dropout (LDO) regulator supplying 3.3
volts to both the BM77 (BAT_IN and VDD_IO) and MCU VDD. This power scheme ensures that BM77
and MCU I/O voltages are compatible.
Figure 1-5 shows an example power scheme using a 3.7 volt lithium-ion battery. The BM77 has an
internal 3.3 volt LDO regulator. Battery power is applied to BAT_IN pin. The regulated 3.3 volts output
is on the LDO33_O 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 BM77 and MCU I/O voltages are
compatible.
CAUTION: The internal 3.3 volt LDO current source: 50 mA maximum
Recommended bypass capacitor location and values are shown in Figures 1-4 and 1-5. Capacitors can be
low ESR ceramic. Place capacitors close to BM77 module. FIGURE 1-4: BM77 TO MCU INTERFACE EXAMPLE – LDO © 2014 ISSC Technologies Corp. Preliminary Revision 2.1.1 – June 16, 2015 Page 6
