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2. CPU Core
2.4 Reset Control Circuit
TMP89FM42
RA001
Note 1: IRSTSR is initialized by an external reset input or power-on reset.
Note 2: Care must be taken in system designing since the IRSTSR may not fulfill its functions due to disturbing noise and other
effects.
Note 3: IRSTSR<FCLR> is initialized by a power-on reset, an external reset input or an internal reset factor.
Note 4: Set IRSTSR<FCLR> to "1" and write 0x71 to SYSCR4. This enables IRSTSR<FCLR> and the internal factor reset detec-
tion status register is clear to "0". IRSTSR<FCLR> is cleared to "0" automatically after initializing the internal factor reset
detection status register.
Note 5: After IRSTSR<FCLR> is modified, SYSCR4 should be written 0x71 (Enable code for IRSTSR<FCLR> in NORMAL mode
when fcgck is fc/4 (CGCR<FCGCKSEL>=00). Otherwise, IRSTSR<FCLR> may be enabled at unexpected timing.
Note 6: Bit 7 of IRSTSR is read as "0".
2.4.3
Functions
The power-on reset, external reset input and internal factor reset signals are input to the warm-up circuit of
the clock generator.
During reset, the warm-up counter circuit is reset, and the CPU and the peripheral circuits are reset.
After reset is released, the warm-up counter starts counting the high frequency clock (fc), and executes the
warm-up operation that follows reset release.
During the warm-up operation that follows reset release, the trimming data is loaded from the non-volatile
exclusive use memory for adjustment of the ladder resistor that generates the comparison voltage for the
power-on reset and the voltage detection circuits.
When the warm-up operation that follows reset release is finished, the CPU starts execution of the program
from the reset vector address stored in addresses 0xFFFE to 0xFFFF.
When a reset signal is input during the warm-up operation that follows reset release, the warm-up counter
circuit is reset.
The reset operation is common to the power-on reset, external reset input and internal factor resets, except
for the initialization of some special function registers and the initialization of the voltage detection circuits.
When a reset is applied, the peripheral circuits become the states as shown in Table 2-5.
FCLR
Flag initialization control
0 :-
1 : Clears the internal factor reset flag to "0".
FLSRF
Flash standby reset detection flag
0 :-
1 : Detects the flash standby reset.
TRMDS
Trimming data status
0 :-
1 : Detect state of abnormal trimming data
TRMRF
Trimming data reset detection flag
0 :-
1 : Detects the trimming data reset.
LVD2RF
Voltage detection reset 2 detection flag
0 :-
1 : Detects the voltage detection 2 reset.
LVD1RF
Voltage detection reset 1 detection flag
0 :-
1 : Detects the voltage detection 1 reset.
SYSRF
System clock reset detection flag
0 :-
1 : Detects the system clock reset.
WDTRF
Watchdog timer reset detection flag
0 :-
1 : Detects the watchdog timer reset.
Содержание TLCS-870/C1 Series
Страница 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 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......