參數(shù)資料
型號: P89LPC921FDH,518
廠商: NXP Semiconductors
文件頁數(shù): 45/46頁
文件大?。?/td> 0K
描述: IC 80C51 MCU 4KB FLASH 20TSSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: LPC900
核心處理器: 8051
芯體尺寸: 8-位
速度: 18MHz
連通性: I²C,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,LED,POR,PWM,WDT
輸入/輸出數(shù): 18
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 3.6 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
包裝: 帶卷 (TR)
Philips Semiconductors
P89LPC920/921/922/9221
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 08 — 15 December 2004
8 of 46
9397 750 14469
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
[1]
Input/Output for P1.0-P1.4, P1.6, P1.7. Input for P1.5.
6.
Logic symbol
P3.0 to P3.1
I/O
Port 3: Port 3 is an 2-bit I/O port with a user-congurable output type. During reset
Port 3 latches are congured 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 conguration
selected. Each port pin is congured independently. Refer to Section 8.12.1 “Port
All pins have Schmitt triggered inputs.
Port 3 also provides various special functions as described below:
7
I/O
P3.0 — Port 3 bit 0.
O
XTAL2 — Output from the oscillator amplier (when a crystal oscillator option is
selected via the FLASH conguration.
O
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.
6
I/O
P3.1 — Port 3 bit 1.
I
XTAL1 — Input to the oscillator circuit and internal clock generator circuits (when
selected via the FLASH conguration). 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.
VSS
5I
Ground: 0 V reference.
VDD
15
I
Power Supply: This is the power supply voltage for normal operation as well as Idle
and Power down modes.
Table 3:
Pin description…continued
Symbol
Pin
Type
Description
Fig 4.
Logic symbol.
VDD
VSS
P89LPC920/921/922/9221
POR
T
0
POR
T
3
POR
T
1
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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