Page 307
TMP89FM42
RA003
21.2 Functions
21.2.1 Flash memory command sequence execution and toggle control (FLSCR1
<FLSMD>)
To prevent inadvertent writes to the flash memory due to program error or microcontroller malfunction, the
execution of the flash memory command sequence and the toggle operation can be disabled (the flash memory
can be write protected) by making an appropriate control register setting (write protect). To enable the execu-
tion of the command sequence and the toggle operation, set FLSCR1<FLSMD> to "0y101", and then set
"0xD5" on FLSCR2<CR1EN>. To disable the execution of the command sequence, set FLSCR1<FLSMD> to
"0y010", and then set "0xD5" on FLSCR2<CR1EN>. If the command sequence or the toggle operation is exe-
cuted with the execution of the command sequence and the toggle operation set to "disable", the executed com-
mand sequence or toggle operation takes no effect.
After a reset, FLSCR1<FLSMD> is initialized to "0y010" to disable the execution of the command
sequence. FLSCR1<FLSMD> should normally be set to "0y010" except when a write or erase is to be per-
formed on the flash memory.
Note 1: If "0xD5" is set on FLSCR2<CR1EN> with FLSCR1<FLSMD> set to "101", the flash memory goes into an
active state, and MCU consumes the same amount of current as it does during a read.
Note 2: If FLSCR1<FLSMD> is set to "disable", subsequent commands (write instructions) generated are rejected
but a command sequence being executed is not initialized.
If you want to set FLSCR1<FLSMD> to "disable", you must finish all command sequences and verify that
the flash memory is ready to be read.
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......