參數(shù)資料
型號： AT89C51ID2-SLSUM
廠商： Atmel
文件頁數(shù)： 24/157頁
文件大小： 0K
描述： IC 8051 MCU FLASH 64K 44PLCC
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
標(biāo)準(zhǔn)包裝： 972
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： 64KB（64K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量： 2K 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-LCC（J 形引線）
包裝： 管件
配用： AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
12
AT89C51ID2
4289C–8051–11/05
I/O
MOSI: SPI Master Output Slave Input line
When SPI is in master mode, MOSI outputs data to the slave peripheral. When SPI is in
slave mode, MOSI receives data from the master controller.
XTALA1
21
15
I
Crystal A 1: Input to the inverting oscillator amplifier and input to the internal clock genera-
tor circuits.
XTALA2
20
14
O
Crystal A 2: Output from the inverting oscillator amplifier
XTALB1
2
40
I
Crystal B 1: (Sub Clock) Input to the inverting oscillator amplifier and input to the internal
clock generator circuits.
XTALB2
1
39
O
Crystal B 2: (Sub Clock) Output from the inverting oscillator amplifier
P2.0 - P2.7
24 - 31
18 - 25
I/O
Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As
inputs, Port 2 pins that are externally pulled low will source current because of the internal
pull-ups. Port 2 emits the high-order address byte during fetches from external program
memory and during accesses to external data memory that use 16-bit addresses (MOVX
@DPTR).In this application, it uses strong internal pull-ups emitting 1s. During accesses to
external data memory that use 8-bit addresses (MOVX @Ri), port 2 emits the contents of
the P2 SFR.
P3.0 - P3.7
11,
13 - 19
5,
7 - 13
I/O
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As
inputs, Port 3 pins that are externally pulled low will source current because of the internal
pull-ups. Port 3 also serves the special features of the 80C51 family, as listed below.
11
5
I
RXD (P3.0): Serial input port
13
7
O
TXD (P3.1): Serial output port
14
8
I
INT0 (P3.2): External interrupt 0
15
9
I
INT1 (P3.3): External interrupt 1
16
10
I
T0 (P3.4): Timer 0 external input
17
11
I
T1 (P3.5): Timer 1 external input
18
12
O
WR (P3.6): External data memory write strobe
19
13
O
RD (P3.7): External data memory read strobe
P4.0 - P4.7
-
I/O
Port 4: Port 4 is an 8-bit bidirectional I/O port with internal pull-ups. Port 5 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As
inputs, Port 4 pins that are externally pulled low will source current because of the internal
pull-ups.
P5.0 - P5.7
-
I/O
Port 5: Port 5 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As
inputs, Port 5 pins that are externally pulled low will source current because of the internal
pull-ups.
PI2.0 - PI2.1
34, 12
28, 6
Port I2: Port I2 is an open drain. It can be used as inputs (must be polarized to Vcc with
external resistor to prevent any parasitic current consumption).
34
28
I/O
SCL (PI2.0): 2-wire Serial Clock
SCL output the serial clock to slave peripherals
SCL input the serial clock from master
Table 15. Pin Description (Continued)
Mnemonic
Pin Number
Type
Name and Function
PLCC44
VQFP44
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