mg84fl54b Megawin Technology, mg84fl54b Datasheet - Page 2

• Manufacturer Part Number: mg84fl54b
• Description: Full-speed Usb Micro-controller
• Manufacturer: Megawin Technology

14. Keypad Interrupt .............................................................................................................40
15. Wake-up from Power-down Mode ..................................................................................41
16. Serial Peripheral Interface (SPI) ..................................................................................... 43
17. 2-wire Serial Interface (TWSI) ........................................................................................ 51
18. One-Time-Enabled Watchdog Timer (WDT)................................................................... 64
19. Universal Serial Bus (USB)............................................................................................. 67
20. In-System-Programming (ISP)........................................................................................76
21. In-Application-Programming (IAP) ..................................................................................79
22. System Clock..................................................................................................................80
23. Power-On Reset .............................................................................................................82
2
15.1. Power-down Wake-up Sources ............................................................................. 41
15.2. Sample Code for Wake-up from Power-down........................................................ 42
16.1. Typical SPI Configurations .................................................................................... 45
16.2. Configuring the SPI................................................................................................ 47
16.3. Data Mode .............................................................................................................49
17.1. The Special Function Registers for TWSI.............................................................. 52
17.2. Operating Modes ................................................................................................... 54
17.3. Miscellaneous States.............................................................................................57
17.4. Using the TWSI...................................................................................................... 58
18.1. WDT Block Diagram ..............................................................................................64
18.2. WDT During Idle and Power Down ........................................................................ 65
18.3. WDT Automatically Enabled by Hardware ............................................................. 65
18.4. WDT Overflow Period ............................................................................................65
18.5. Sample Code for WDT...........................................................................................66
19.1. USB Block Diagram ...............................................................................................67
19.2. USB FIFO Management ........................................................................................ 67
19.3. USB Special Function Registers............................................................................ 68
20.1. Description for ISP Operation ................................................................................77
20.2. Demo Program for ISP ..........................................................................................78
21.1. IAP-memory Boundary/Range ............................................................................... 79
21.2. Update the data in the IAP-memory....................................................................... 79
22.1. Programmable System Clock ................................................................................ 80
22.2. On-chip XTAL Oscillating Driving Control .............................................................. 81
16.1.1. Single Master & Single Slave ...................................................................................45
16.1.2. Dual Device, where either can be a Master or a Slave .............................................45
16.1.3. Single Master & Multiple Slaves ..............................................................................46
16.2.1. Additional Considerations for a Slave ......................................................................47
16.2.2. Additional Considerations for a Master ....................................................................47
16.2.3. Mode Change on /SS-pin ..........................................................................................48
16.2.4. No Write Collision ....................................................................................................48
16.2.5. SPI Clock Rate Select ...............................................................................................48
16.3.1. SPI Slave Transfer Format with CPHA=0................................................................49
16.3.2. SPI Slave Transfer Format with CPHA=1................................................................49
16.3.3. SPI Master Transfer Format with CPHA=0..............................................................50
16.3.4. SPI Master Transfer Format with CPHA=1..............................................................50
17.2.1. Master Transmitter Mode..........................................................................................54
17.2.2. Master Receiver Mode ..............................................................................................55
17.2.3. Slave Transmitter Mode............................................................................................55
17.2.4. Slave Receiver Mode ................................................................................................56
19.3.1. USB SFR Memory Mapping ....................................................................................68
19.3.2. USB SFR Description ...............................................................................................69
MG84FL54B Data Sheet
MEGAWIN