参数资料
型号: P89LPC9221FDH,518
厂商: NXP Semiconductors
文件页数: 11/46页
文件大小: 0K
描述: IC 80C51 MCU 8KB FLASH 20TSSOP
标准包装: 2,500
系列: LPC900
核心处理器: 8051
芯体尺寸: 8-位
速度: 18MHz
连通性: I²C,UART/USART
外围设备: 欠压检测/复位,LED,POR,PWM,WDT
输入/输出数: 18
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 3.6 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
包装: 带卷 (TR)
Philips Semiconductors
P89LPC920/921/922/9221
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 08 — 15 December 2004
19 of 46
9397 750 14469
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.12 I/O ports
The P89LPC920/921/922/9221 has three I/O ports: Port 0, Port 1, and Port 3. Ports 0
and 1 are 8-bit ports, and Port 3 is a 2-bit port. The exact number of I/O pins available
depend upon the clock and reset options chosen, as shown in Table 6.
[1]
Required for operation above 12 MHz.
8.12.1
Port congurations
All but three I/O port pins on the P89LPC920/921/922/9221 may be congured by
software to one of four types on a bit-by-bit basis. These are: quasi-bidirectional
(standard 80C51 port outputs), push-pull, open drain, and input-only. Two
conguration registers for each port select the output type for each port pin.
P1.5 (RST) can only be an input and cannot be congured.
Fig 6.
Interrupt sources, interrupt enables, and power-down wake-up sources.
002aaa418
IE0
EX0
IE1
EX1
BOF
EBO
KBIF
EKBI
INTERRUPT
TO CPU
WAKE-UP
(IF IN POWER-DOWN)
EWDRT
CMF2
CMF1
EC
EA (IE0.7)
TF0
ET0
TF1
ET1
TI & RI/RI
ES/ESR
TI
EST
SI
EI2C
RTCF
ERTC
(RTCCON.1)
WDOVF
Table 6:
Number of I/O pins available
Clock source
Reset option
Number of I/O pins
(20-pin package)
On-chip oscillator or
watchdog oscillator
No external reset (except during power-up)
18
External RST pin supported[1]
17
External clock input
No external reset (except during power-up)
17
External RST pin supported[1]
16
Low/medium/high
speed oscillator
(external crystal or
resonator)
No external reset (except during power-up)
16
External RST pin supported[1]
15
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