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參數(shù)資料
| 型號： | AT87F52-24PC |
| 廠商： | Atmel |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MICRO CTRL 24MHZ 40DIP |
| 標準包裝： | 10 |
| 系列： | 87F |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 24MHz |
| 連通性： | UART/USART |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器容量： | 8KB（8K x 8） |
| 程序存儲器類型： | OTP 快速閃存 |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4 V ~ 6 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 40-DIP（0.600"，15.24mm） |
| 包裝： | 管件 |
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3
The AT87F52 provides the following standard features: 8K
bytes of QuickFlash, 256 bytes of RAM, 32 I/O lines, three
16-bit timer/counters, a six-vector two-level interrupt archi-
tecture, a full duplex serial port, on-chip oscillator, and
clock circuitry. In addition, the AT87F52 is designed with
static logic for operation down to zero frequency and sup-
ports two software selectable power saving modes. The
Idle Mo de stops the CPU while allowing the RAM ,
timer/counters, serial port, and interrupt system to continue
functioning. The Power Down Mode saves the RAM con-
tents but freezes the oscillator, disabling all other chip func-
tions until the next hardware reset.
Pin Description
VCC
Supply voltage.
GND
Ground.
Port 0
Port 0 is an 8-bit open drain bidirectional I/O port. As an
output port, each pin can sink eight TTL inputs. When 1s
are written to port 0 pins, the pins can be used as high-
impedance inputs.
Port 0 can also be configured to be the multiplexed low-
order address/data bus during accesses to external pro-
gram and data memory. In this mode, P0 has internal pul-
lups.
Port 0 also receives the code bytes during QuickFlash pro-
gramming and outputs the code bytes during program veri-
fication. External pullups are required during program verifi-
cation.
Port 1
Port 1 is an 8-bit bidirectional I/O port with internal pullups.
The Port 1 output buffers can sink/source four TTL inputs.
When 1s are written to Port 1 pins, they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 1 pins that are externally being pulled low will source
current (IIL) because of the internal pullups.
In addition, P1.0 and P1.1 can be configured to be the
timer/counter 2 external count input (P1.0/T2) and the
timer/counter 2 trigger input (P1.1/T2EX), respectively, as
shown in the following table.
Port 1 also receives the low-order address bytes during
QuickFlash programming and verification.
Port 2
Port 2 is an 8-bit bidirectional I/O port with internal pullups.
The Port 2 output buffers can sink/source four TTL inputs.
When 1s are written to Port 2 pins, they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 2 pins that are externally being pulled low will source
current (IIL) because of the internal pullups.
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, Port 2 uses strong internal pul-
lups when emitting 1s. During accesses to external data
memory that use 8-bit addresses (MOVX @ RI), Port 2
emits the contents of the P2 Special Function Register.
Port 2 also receives the high-order address bits and some
control signals during QuickFlash programming and verifi-
cation.
Port 3
Port 3 is an 8-bit bidirectional I/O port with internal pullups.
The Port 3 output buffers can sink/source four TTL inputs.
When 1s are written to Port 3 pins, they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 3 pins that are externally being pulled low will source
current (IIL) because of the pullups.
Port 3 also serves the functions of various special features
of the AT89C51, as shown in the following table.
Port 3 also receives some control signals for QuickFlash
programming and verification.
RST
Reset input. A high on this pin for two machine cycles while
the oscillator is running resets the device.
ALE/PROG
Address Latch Enable is an output pulse for latching the
low byte of the address during accesses to external mem-
ory. This pin is also the program pulse input (PROG) during
QuickFlash programming.
In normal operation, ALE is emitted at a constant rate of 1/6
the oscillator frequency and may be used for external tim-
ing or clocking purposes. Note, however, that one ALE
Port Pin
Alternate Functions
P1.0
T2 (external count input to Timer/Counter 2),
clock-out
P1.1
T2EX (Timer/Counter 2 capture/reload trigger
and direction control)
Port Pin
Alternate Functions
P3.0
RXD (serial input port)
P3.1
TXD (serial output port)
P3.2
INT0 (external interrupt 0)
P3.3
INT1 (external interrupt 1)
P3.4
T0 (timer 0 external input)
P3.5
T1 (timer 1 external input)
P3.6
WR (external data memory write strobe)
P3.7
RD (external data memory read strobe)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT87F52-24PI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-Bit Microcontroller with 8K Bytes QuickFlash |
| AT87F55WD | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 20K Bytes QuickFlash⑩ |
| AT87F55WD-24AC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 20K Bytes QuickFlash⑩ |
| AT87F55WD-24AI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 20K Bytes QuickFlash⑩ |
| AT87F55WD-24JC | 功能描述:8位微控制器 -MCU 80C31 w/20k 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT |
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