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參數(shù)資料
| 型號： | TS87C54X2-VCA |
| 廠商： | Atmel |
| 文件頁數(shù)： | 22/62頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 8BIT 16K OTP 40MHZ 40-DIP |
| 標(biāo)準(zhǔn)包裝： | 9 |
| 系列： | 87C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 40/30MHz |
| 連通性： | UART/USART |
| 外圍設(shè)備： | POR，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器容量： | 16KB（16K x 8） |
| 程序存儲器類型： | OTP |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 40-DIP（0.600"，15.24mm） |
| 包裝： | 管件 |
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29
4431E–8051–04/06
AT/TS8xC54/8X2
11. Idle mode
An instruction that sets PCON.0 causes that to be the last instruction executed before going into
the Idle mode. In the Idle mode, the internal clock signal is gated off to the CPU, but not to the
interrupt, Timer, and Serial Port functions. The CPU status is preserved in its entirely : the Stack
Pointer, Program Counter, Program Status Word, Accumulator and all other registers maintain
their data during Idle. The port pins hold the logical states they had at the time Idle was acti-
vated. ALE and PSEN hold at logic high levels.
There are two ways to terminate the Idle. Activation of any enabled interrupt will cause PCON.0
to be cleared by hardware, terminating the Idle mode. The interrupt will be serviced, and follow-
ing RETI the next instruction to be executed will be the one following the instruction that put the
device into idle.
The flag bits GF0 and GF1 can be used to give an indication if an interrupt occured during nor-
mal operation or during an Idle. For example, an instruction that activates Idle can also set one
or both flag bits. When Idle is terminated by an interrupt, the interrupt service routine can exam-
ine the flag bits.
The other way of terminating the Idle mode is with a hardware reset. Since the clock oscillator is
still running, the hardware reset needs to be held active for only two machine cycles (24 oscilla-
tor periods) to complete the reset.
11.1
Power-Down Mode
To save maximum power, a power-down mode can be invoked by software (Refer to Table 9-4.,
PCON register).
In power-down mode, the oscillator is stopped and the instruction that invoked power-down
mode is the last instruction executed. The internal RAM and SFRs retain their value until the
power-down mode is terminated. V
CC can be lowered to save further power. Either a hardware
reset or an external interrupt can cause an exit from power-down. To properly terminate power-
down, the reset or external interrupt should not be executed before VCC is restored to its normal
operating level and must be held active long enough for the oscillator to restart and stabilize.
Only external interrupts INT0 and INT1 are useful to exit from power-down. For that, interrupt
must be enabled and configured as level or edge sensitive interrupt input.
Holding the pin low restarts the oscillator but bringing the pin high completes the exit as detailed
in Figure 11-1. When both interrupts are enabled, the oscillator restarts as soon as one of the
two inputs is held low and power down exit will be completed when the first input will be
released. In this case the higher priority interrupt service routine is executed.
Once the interrupt is serviced, the next instruction to be executed after RETI will be the one fol-
lowing the instruction that put TS80C54/58X2 into power-down mode.
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| TS87C54X2-VCAD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|DIP|40PIN|PLASTIC |
| TS87C54X2-VCB | 功能描述:IC MCU 8BIT 16K OTP 40MHZ 44PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 標(biāo)準(zhǔn)包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，LIN，SPI，UART/USART，USI 外圍設(shè)備:欠壓檢測/復(fù)位，POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB（4K x 16） 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:帶卷 (TR) |
| TS87C54X2-VCBB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|LDCC|44PIN|PLASTIC |
| TS87C54X2-VCBD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|LDCC|44PIN|PLASTIC |
| TS87C54X2-VCBR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|LDCC|44PIN|PLASTIC |
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