参数资料
型号: AT89C51IC2-SLRUM
厂商: Atmel
文件页数: 13/140页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 44-PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 500
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 标准包装
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
其它名称: AT89C51IC2-SLRUMDKR
11
AT89C51IC2
4301D–8051–02/08
Table 13. Pin Description for 40/44 Pin Packages
Mnemonic
Pin Number
Type
Name and Function
PLCC44
VQFP44 1.4
V
SS
22
16
I
Ground: 0V reference
VCC
44
38
I
Power Supply: This is the power supply voltage for normal, idle and power-down
operation
P0.0 - P0.7
43 - 36
37 - 30
I/O
Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to
them float and can be used as high impedance inputs. Port 0 must be polarized to VCC
or V
SS in order to prevent any parasitic current consumption. Port 0 is also the multi-
plexed low-order address and data bus during access to external program and data
memory. In this application, it uses strong internal pull-up when emitting 1s. Port 0 also
inputs the code bytes during EPROM programming. External pull-ups are required dur-
ing program verification during which P0 outputs the code bytes.
P1.0 - P1.7
2 - 9
40 - 44
1 - 3
I/O
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that
have 1s written to them are pulled high by the internal pull-ups and can be used as
inputs. As inputs, Port 1 pins that are externally pulled low will source current because
of the internal pull-ups. Port 1 also receives the low-order address byte during memory
programming and verification.
Alternate functions for AT89C51IC2 Port 1 include:
2
40
I/O
P1.0: Input/Output
I/O
T2 (P1.0): Timer/Counter 2 external count input/Clockout
I
XTALB1 (P1.0): Sub Clock input to the inverting oscillator amplifier
3
41
I/O
P1.1: Input/Output
I
T2EX: Timer/Counter 2 Reload/Capture/Direction Control
I
SS: SPI Slave Select
4
42
I/O
P1.2: Input/Output
I
ECI: External Clock for the PCA
5
43
I/O
P1.3: Input/Output
I/O
CEX0: Capture/Compare External I/O for PCA module 0
6
44
I/O
P1.4: Input/Output
I/O
CEX1: Capture/Compare External I/O for PCA module 1
7
1
I/O
P1.5: Input/Output
I/O
CEX2: Capture/Compare External I/O for PCA module 2
I/O
MISO: SPI Master Input Slave Output line
When SPI is in master mode, MISO receives data from the slave peripheral. When SPI
is in slave mode, MISO outputs data to the master controller.
8
2
I/O
P1.6: Input/Output
I/O
CEX3: Capture/Compare External I/O for PCA module 3
I/O
SCK: SPI Serial Clock
SCK outputs clock to the slave peripheral
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