參數(shù)資料
型號(hào)： P89CE558EBB
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： Single-chip 8-bit microcontroller
中文描述： 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP80
文件頁(yè)數(shù)： 45/72頁(yè)
文件大小： 721K
代理商： P89CE558EBB
Philips Semiconductors
Preliminary specification
P83CE558/P80CE558/P89CE558
Single-chip 8-bit microcontroller
1996 Aug 06
45
6.13.4
This counter provides an overflow signal every second, when the
32kHz oscillator is running.
Seconds Timer
The overflow output sets the interrupt flag SECINT. This interrupt
can be disabled/enabled by ENSECI. If SECINT is enabled, it is
logically ORed with INT1 (external interrupt 1).
Seconds interrupt and INT1 therefor share the same priority and
vector. The software has to check both flags SECINT (PLLCON.5)
and IE1 (TCON.3), to distinguish between the two interrupt sources.
SECINT can only be cleared via writing a ‘0’ to this bit .
The external interrupts INT0 , INT1 or the seconds interrupt can
Wake-up the PLL oscillator and the microcontroller as described in
chapter “Wake-up from Power-down Mode”.
For a Wake-up via INT1 or seconds interrupt, IE1 must be enabled
and level-sensitive.
A further function of the seconds timer is to control the start-up
timing of the microcontroller after Reset or after Wake-up from
Power-down. It controls the stretching of the reset pulse to the
microcontroller and controls releasing the system clock to the
microcontroller.
A RSTIN signal of 1us at minimum will reset the microcontroller.
In case of Reset or Wake-up with halted 32kHz oscillator: From
RSTIN falling edge or Wake-up interrupt it takes 560ms at maximum
for the start-up of the 32kHz oscillator itself and the stabilization of
the PLL’s.
In case of Wake-up with running 32kHz oscillator: From Wake-up
interrupt it takes about 1ms for the stabilization of the PLL’s.
After this start-up time, the microcontroller is supplied with the
system clock and – in case of a reset – the internally
stretched reset
signal overlaps about 45us, to guarantee a proper initialization of the
microcontroller.
For further information refer to section
6.11 Power reduction modes
.
XTAL3
Figure 45. Block diagram PLL
Oscil-
lator
32.768 KHz
C
1
32 kHz
Phase
comparator
Loop
filter
CCO
PD
Internal Bus
SECONDS TIMER
PLLCON
RSTIN
Programmable
divider
system clock
Reset to controller
’Seconds’
Interrupt
request
PD = power down
Stretched
Reset
RUN32 PD
R
f
C
2
XTAL4
相關(guān)PDF資料
PDF描述
P89CE558EFB Single-chip 8-bit microcontroller
P80CE558 Single-chip 8-bit microcontroller(8位單片微控制器)
P80CE558EBB Single-chip 8-bit microcontroller
P80CE558EFB Single-chip 8-bit microcontroller
P89LPC901 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P89CE558EFB 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller
P89CV51RB2 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals
P89CV51RB2_09 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals
P89CV51RB2BBC,557 制造商:NXP Semiconductors 功能描述:
P89CV51RB2FA 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*