User Manual

Advanc
e
Information

2015 Microchip Technology Inc.
page
15
BM78SPPS5MC2 , RN4678
4.0 Status Indication I/O Pins
I/O pins P1_5 and P0_4 are Status Indicator 1 and 2 signals respectively. Together they
provide status indication to the MCU as shown in Table 4‐1.
TABLE 4‐1: STATUS INDICATION
P1_5
/STATUS_IND_1
P0_4
/STATUS_IND_2
Indication
H H Power-on to setting default and Shutdown State.
HH status should be stable for at least 500ms
H L Access state
L H Link state
(
UART data be
tween
being and stop
transmitted)
L L Link state (UART data stop transmitted)
4.1 System Configuration
I/O pins P2_0, P2_4, and EAN place the BM78 into operation modes as shown in Table 4‐2.
P2_0 , P2_4and EAN each have internal pull-ups.
TABLE 4‐2: SYSTEM CONFIGURATION SETTINGS
IC P2_0 P2_4 EAN Operational Mode
IS1678S Low High High Write EEPROM and test mode
High High High Normal operation / APP Mode