Preliminary Datasheet BM77SPPx3MC2 (Microchip) - 5

BM77SPPx3MC2
Configuring the BM77 features can be performed using either MCU commands documented in the “ISSC
Flash Protocol Programmer’s Guide,” or with the “Windows UI Configuration tool” and “Write EEPROM
tool.” MCU UART commands are documented in “BM77SPP Command Set.” 1.3 UART Interface Figures 1-4 and 1-5 show Power and MCU interface examples.
The BM77 UART pins TXD and RXD connect to the UART pins of the host MCU. It is highly
recommended to use hardware flow control pins RTS and CTS. The BM77 hardware flow control is
disabled by default and must be configured to enable. The UART Baud is configurable. The available
signal rates are listed in Table 4-5. 1.4 Control and Indication I/O Pins I/O pins P00, P05, P17, P31, P32, P33, P34 and P37 are configurable control and indication I/O. Control
signals are input to the BM77. Indication signals are output from the BM77. Table 1-2 shows
configurable I/O pin assignment to control and indication signals. Note that RTS can only be assigned to
P00 and CTS to P17. P00
P05
P17
P31
P32
P33
P34
P37 PROFILE_IND INQUIRY CONTROL DISCOVERY_CONTROL UART_RX_IND DISCONNECT_CONTROL LINK_QUALITY_IND LOW_BATTERY_IND UART_CTS N/C UART_RTS TABLE 1-2: CONFIGURATION AND INDICATION I/O ASSIGNMENTS Default
Default
Default
Default Default Default
Default
Default 1.5 Status Indication I/O Pins I/O pins P15 and P04 are Status Indicator 1 and 2 signals respectively. Together they provide status
indication to the MCU as shown in Table 1-3.
TABLE 1-3: STATUS INDICATION
P04/STATUS_IND_2
H
H
L
L 1.6 P15/STATUS_IND_1
H
L
H
L Software Button (SW_BTN) © 2014 ISSC Technologies Corp. Indication
Power default / Shutdown state
Access state
Link state (no UART data being transmitted)
Link state (UART data being transmitted) Preliminary Revision 2.1.1 – June 16, 2015 Page 5