參數(shù)資料
型號(hào): AT89LP52-20JU
廠商: Atmel
文件頁數(shù): 54/117頁
文件大小: 0K
描述: IC MCU 8051 8K FLASH SPI 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: EBI/EMI,I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: *
41
3709D–MICRO–12/11
AT89LP51/52
10. I/O Ports
The AT89LP51/52 can be configured for between 32 and 36 I/O pins. The exact number of I/O
pins available depends on the clock, external memory and package type as shown in Table 10-
10.1
Port Configuration
Each 8-bit port on the AT89LP51/52 may be configured in one of four modes: quasi-bidirectional
(standard 8051 port outputs), push-pull output, open-drain output, or input-only. Port modes may
be assigned in software on a port-by-port basis as shown in Table 10-2 using the PMOD register
listed in Table 10-3. The Tristate-Port User Fuse determines the default state of the port pins
(See “User Configuration Fuses” on page 86). When the fuse is enabled, all port pins default to
input-only mode after reset. When the fuse is disabled, all port pins on P1, P2 and P3 default to
quasi-bidirectional mode after reset and are weakly pulled high. P0 is set to Open-drain mode.
P4 always operates in quasi-bidirectional mode.
Each port pin also has a Schmitt-triggered input for improved input noise rejection. During
Power-down all the Schmitt-triggered inputs are disabled with the exception of P3.2 (INT0), P3.3
(INT1), RST, P4.6 (XTAL1) and P4.7 (XTAL2). Therefore, P3.2, P3.3, P4.6 and P4.7 should not
be left floating during Power-down.
.
Table 10-1.
I/O Pin Configurations
Clock Source
External Program Access
External Data Access
Number of I/O
Pins
External Crystal or
Resonator
Yes (PSEN+ALE+P0+P2)
Yes (RD+WR)
14
No
16
No
Yes (ALE+RD+WR+P0)
31
No
34
External Clock
Yes (PSEN+ALE+P0+P2)
Yes (RD+WR)
15
No
17
No
Yes (ALE+RD+WR+P0)
32
No
35
Internal RC
Oscillator
Yes (PSEN+ALE+P0+P2)
Yes (RD+WR)
16
No
18
No
Yes (ALE+RD+WR+P0)
33
No
36
Table 10-2.
Configuration Modes for Port x
PxM0
PxM1
Port Mode
00
Quasi-bidirectional
01
Push-pull Output
10
Input Only (High Impedance)
1
Open-Drain Output
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AT89LP52-20MU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP52-20PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP6440-20AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP6440-20JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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