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參數(shù)資料
| 型號： | P89LPC921 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | MINIATURE POWER RELAY |
| 中文描述： | 8位微控制器兩個小時80C51的核心2鍵盤/ 4 KB的/ 8 KB的3伏的低功耗Flash 256 - RAM的字節(jié)數(shù)據(jù) |
| 文件頁數(shù)： | 8/45頁 |
| 文件大小： | 877K |
| 代理商： | P89LPC921 |
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Philips Semiconductors
P89LPC920/921/922
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 06 — 21 November 2003
8 of 45
9397 750 12285
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
[1]
Input/Output for P1.0-P1.4, P1.6, P1.7. Input for P1.5.
6.
Logic symbol
P3.0 - P3.1
7, 6
I/O
Port 3:
Port 3 is an 2-bit I/O port with a user-configurable output type. During reset
Port 3 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 3 pins as inputs and outputs depends upon the port configuration
selected. Each port pin is configured independently. Refer to
Section 8.12.1 “Port
configurations”
and
Table 8 “DC electrical characteristics”
for details.
All pins have Schmitt triggered inputs.
Port 3 also provides various special functions as described below:
P3.0 —
Port 3 bit 0.
XTAL2 —
Output from the oscillator amplifier (when a crystal oscillator option is
selected via the FLASH configuration.
CLKOUT —
CPU clock divided by 2 when enabled via SFR bit (ENCLK - TRIM.6). It
can be used if the CPU clock is the internal RC oscillator, watchdog oscillator or
external clock input, except when XTAL1/XTAL2 are used to generate clock source for
the real time clock/system timer.
P3.1 —
Port 3 bit 1.
XTAL1 —
Input to the oscillator circuit and internal clock generator circuits (when
selected via the FLASH configuration). It can be a port pin if internal RC oscillator or
watchdog oscillator is used as the CPU clock source,
and
if XTAL1/XTAL2 are not used
to generate the clock for the real time clock/system timer.
Ground:
0 V reference.
Power Supply:
This is the power supply voltage for normal operation as well as Idle
and Power Down modes.
7
I/O
O
O
6
I/O
I
V
SS
V
DD
5
15
I
I
Table 3:
Symbol
Pin description
…continued
Pin
Type
Description
Fig 4.
Logic symbol.
VDD
VSS
P
P
P
P
TxD
RxD
T0
INT0
INT1
RST
SCL
SDA
002aaa409
CMP2
CIN2B
CIN2A
CIN1B
CIN1A
CMPREF
CMP1
T1
XTAL2
XTAL1
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
CLKOUT
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| P89LPC9211 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash with 8-bit ADC |
| P89LPC9211FDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash with 8-bit ADC |
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| P89LPC921FDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM |
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