User Manual

Stereo Module

2015 Microchip Technology Inc.
Page 17
P
reliminary
Edition
2.5 EXTERNAL CONFIGURATION
Stereo module can be configured and firmware programmed using an external configuration and
programming tool available from Microchip. Figure 2‐7 shows the configuration and firmware
programming interface on BM23. It is recommended to include a pin header on the main PCB for
development.
Configuration and firmware programming modes are entered accordingly to the system
configuration I/O pins as shown in Table 2-1. Pin P20, P24 and EAN pin have internal pull‐up.
FIGURE 2-13: EXTERNAL PROGRAMMING HEADER CONNECTIONS
(Here is the interface connect example of the BM23)
TABLE 2-1: SYSTEM CONFIGURATION SETTINGS
P20 P24 EAN Operational Mode
High High
High
APP mode (Normal operation)
Low High
High
Test mode (Write EEPROM)
Low Low High Write Flash (Firmware programming if flash build-in in chip)