Toshiba TX03 Series Manual page 19

21.3.2 Operation Mode and Status...........................................................................................................................................435
21.4 Operation when malfunction (runaway) is detected...........................................................436
21.4.1 INTWDT interrupt generation.......................................................................................................................................436
21.4.2 Internal reset generation................................................................................................................................................437
21.5 Control register....................................................................................................................438
21.5.1 Watchdog Timer Mode Register (WDMOD)...............................................................................................................438
21.5.2 Watchdog Timer Control Register(WDCR).................................................................................................................438
21.5.3 Setting example.............................................................................................................................................................439
21.5.3.1 Disabling control
21.5.3.2 Enabling control
21.5.3.3 Watchdog timer clearing control
21.5.3.4 Detection time of watchdog timer
22. Flash Memory Operation
22.1 Features................................................................................................................................441
22.1.1 Memory Size and Configuration...................................................................................................................................441
22.1.2 Function.........................................................................................................................................................................442
22.1.3 Operation Mode.............................................................................................................................................................442
22.1.3.1 Mode Description
22.1.3.2 Mode Determination
22.1.4 Memory Map.................................................................................................................................................................445
22.1.5 Protect/Security Function..............................................................................................................................................446
22.1.5.1 Protect Function
22.1.5.2 Protect Bit Mask Function
22.1.5.3 Security Function
22.1.6 Register..........................................................................................................................................................................448
22.1.6.1 Register List
22.1.6.2 FCSECBIT (Security bit register)
22.1.6.3 FCCR (Flash Interface control register)
22.1.6.4 FCSR (Flash status register)
22.1.6.5 FCPSRA (Flash protect status register)
22.1.6.6 FCPMRA (Flash protect mask register)
22.2 Detail of Flash Memory......................................................................................................453
22.2.1 Function.........................................................................................................................................................................453
22.2.2 Operation Mode of Flash Memory...............................................................................................................................453
22.2.3 Hardware Reset..............................................................................................................................................................453
22.2.4 How to Execute Command...........................................................................................................................................454
22.2.5 Command Description...................................................................................................................................................454
22.2.5.1 Automatic Page Program
22.2.5.2 Automatic Chip Erase
22.2.5.3 Automatic Block Erase
22.2.5.4 Automatic Protect Bit Program
22.2.5.5 Auto Protect Bit Erase
22.2.5.6 ID-Read
22.2.5.7 Read Command and Read/reset Command (Software Reset)
22.2.6 Command Sequence......................................................................................................................................................458
22.2.6.1 Command Sequence List
22.2.6.2 Address Bit Configuration in the Bus Cycle
22.2.6.3 Block Address (BA)
22.2.6.4 How to Specify Protect Bit (PBA)
22.2.6.5 ID-Read Code (IA, ID)
22.2.6.6 Example of Command Sequence
22.2.7 Flowchart.......................................................................................................................................................................462
22.2.7.1 Automatic Program
22.2.7.2 Automatic Erase
22.3 How to Reprogram Flash using Single Boot Mode...........................................................464
22.3.1 Mode Setting..................................................................................................................................................................464
22.3.2 Interface Specification...................................................................................................................................................464
22.3.3 Restrictions on Internal Memories................................................................................................................................465
22.3.4 Operation Command......................................................................................................................................................465
22.3.4.1 RAM Transfer
22.3.4.2 Flash Memory Chip Erase and Protect Bit Erase
22.3.5 Common Operation regardless of Command...............................................................................................................466
22.3.5.1 Serial Operation Mode Determination
22.3.5.2 Acknowledge Response Data
22.3.5.3 Password Determination
22.3.5.4 CHECK SUM Calculation
xi