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| 型號： | P80C557E6 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Single-chip 8-bit microcontroller(單片8位微控制器) |
| 中文描述： | 單芯片8位微控制器（單片8位微控制器） |
| 文件頁數(shù)： | 42/64頁 |
| 文件大小： | 476K |
| 代理商： | P80C557E6 |
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Philips Semiconductors
Product specification
P83C557E6/P80C557E6
Single-chip 8-bit microcontroller
1999 Mar 02
42
Figure 41. Wake-up by interrupt
INT0
INT1
set External Interrupt latch
INT0 : 2 cycles
INT1 : 1 cycle
Internal timing stopped
C1
C1
C1
C2
Power–down Mode
Idle Mode
LCALL
oscillator stopped
oscillator start_up
interrupts are polled
Interrupt routine
> 10 ms
> 560 ms
> 10 ms
XTAL1,2
32 kHz oscillator stopped
running
Figure 42. Using the On-Chip Oscillator.
Quartz crystal
or ceramic
resonator
C1
C2
XTAL1
XTAL2
V
SS
C1 = C2 = 20pF
External
clock
signal
XTAL2
XTAL1
V
SS
Figure 43. Using an external clock.
SELXTAL1
1
SELXTAL1
1
(NC)
6.12
The input signal SELXTAL1 connected to logic “1” selects the
XTAL1, 2 oscillator (standard 80C51) instead of the XTAL3, 4
oscillator, which is halted and XTAL3, 4 must not be connected.
Oscillator Circuits
6.12.1
The oscillator circuit of the P8xC557E6 is a single–stage inverting
amplifier in a Pierce oscillator configuration. The circuitry between
the XTAL1 and XTAL2 is basically an inverter biased to the transfer
point. Either a crystal or ceramic resonator can be used as the
feedback element to complete the oscillator circuitry. Both are
operated in parallel resonance. XTAL1 is the high gain amplifier
input, and XTAL2 is the output (see Figure 42). To drive the
P8xC557E6 externally, XTAL1 is driven from an external source and
XTAL2 left open–circuit (see Figure 43).
XTAL1, 2 Oscillator circuit (standard 80C51)
6.12.2
Please refer to chapter 6.13.1
XTAL3, 4 Circuitry
6.13
32 kHz PLL Oscillator with Seconds Timer
6.13.1
The input signal SELXTAL1 connected to logic “0” selects the 32kHz
oscillator together with the PLL instead of the XTAL1,2 oscillator,
which is halted. XTAL2 is floating in that case.
XTAL3,4 Oscillator Circuitry
The 32kHz oscillator consists of an inverter, which forms a Pierce
oscillator with the on–chip components C1,C2,Rf and an external
crystal of 32768 Hz.
During the following situations, the inverter is switched to tristate and
XTAL3 is pulled to Vss :
during Power–down Mode, when the PLL control register bit
RUN32 (PLLCON.7) was set to ‘0’;
during Reset (RSTIN = HIGH) ;
when the XTAL1,2 oscillator is selected (SELXTAL1 = HIGH).
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| P80C557E6EBB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller |
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| P80C557E8EFB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| P80C562 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller |
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