參數(shù)資料
型號: AT89C51IC2-RLRIM
廠商: Atmel
文件頁數(shù): 13/140頁
文件大?。?/td> 0K
描述: IC MCU FLASH 8051 32K 5V 44-VQFP
標(biāo)準(zhǔn)包裝: 1
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LQFP
包裝: 剪切帶 (CT)
其它名稱: AT89C51IC2RLRIMCT
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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