參數資料
型號： TMP86FH09NG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PDIP32
封裝： 0.400 INCH, 1.78 MM PITCH, LEAD FREE, PLASTIC, SDIP-32
文件頁數： 125/154頁
文件大?。?/td> 1433K
代理商： TMP86FH09NG
Page 62
7. Watchdog Timer (WDT)
7.3 Address Trap
TMP86CH09NG
7.3 Address Trap
The Watchdog Timer Control Register 1 and 2 share the addresses with the control registers to generate address
traps.
7.3.1 Selection of Address Trap in Internal RAM (ATAS)
WDTCR1<ATAS> specifies whether or not to generate address traps in the internal RAM area. To execute
an instruction in the internal RAM area, clear WDTCR1<ATAS> to “0”. To enable the WDTCR1<ATAS> set-
ting, set WDTCR1<ATAS> and then write D2H to WDTCR2.
Executing an instruction in the SFR area generates an address trap unconditionally regardless of the setting
in WDTCR1<ATAS>.
7.3.2 Selection of Operation at Address Trap (ATOUT)
When an address trap is generated, either the interrupt request or the reset request can be selected by
WDTCR1<ATOUT>.
7.3.3 Address Trap Interrupt (INTATRAP)
While WDTCR1<ATOUT> is “0”, if the CPU should start looping for some cause such as noise and an
attempt be made to fetch an instruction from the on-chip RAM (while WDTCR1<ATAS> is “1”) or the SFR
area, address trap interrupt (INTATRAP) will be generated.
An address trap interrupt is a non-maskable interrupt which can be accepted regardless of the interrupt mas-
ter flag (IMF).
When an address trap interrupt is generated while the other interrupt including a watchdog timer interrupt is
already accepted, the new address trap is processed immediately and the previous interrupt is held pending.
Therefore, if address trap interrupts are generated continuously without execution of the RETN instruction, too
many levels of nesting may cause a malfunction of the microcontroller.
To generate address trap interrupts, set the stack pointer beforehand.
Watchdog Timer Control Register 1
WDTCR1
(0034H)
76
5
4
3
21
0
ATAS
ATOUT
(WDTEN)
(WDTT)
(WDTOUT)
(Initial value: **11 1001)
ATAS
Select address trap generation in
the internal RAM area
0: Generate no address trap
1: Generate address traps (After setting ATAS to “1”, writing the control code
D2H to WDTCR2 is reguired)
Write
only
ATOUT
Select opertion at address trap
0: Interrupt request
1: Reset request
Watchdog Timer Control Register 2
WDTCR2
(0035H)
76
543
21
0
(Initial value: **** ****)
WDTCR2
Write
Watchdog timer control code
and address trap area control
code
D2H: Enable address trap area selection (ATRAP control code)
4EH: Clear the watchdog timer binary counter (WDT clear code)
B1H: Disable the watchdog timer (WDT disable code)
Others: Invalid
Write
only
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相關代理商/技術參數
參數描述
TMP86FH09NG(ZM) 功能描述:8位微控制器 -MCU TLCS870/C 16K FLASH RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
TMP86FH12MG 制造商:Toshiba America Electronic Components 功能描述:MCU 8BIT TLCS-870 CISC 16KB FLASH 5V 30SSOP - Bulk 制造商:Toshiba America Electronic Components 功能描述:8BIT MCU 16K FLASH 512B RAM 86FH12
TMP86FH12MG(Z) 功能描述:8位微控制器 -MCU 16k Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
TMP86FH46ANG 制造商:Toshiba America Electronic Components 功能描述:MCU 8BIT TLCS-870 CISC 16KB FLASH 5V 42PIN SDIP - Bulk
TMP86FH46ANG(Z) 功能描述:8位微控制器 -MCU 16K Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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