- 您现在的位置：买卖IC网 > PDF目录381506 > AT89S4D12 (Atmel Corp.) 8-Bit Microcontroller with 132K Bytes Flash Data Memory PDF资料下载
参数资料
| 型号： | AT89S4D12 |
| 厂商： | Atmel Corp. |
| 英文描述： | 8-Bit Microcontroller with 132K Bytes Flash Data Memory |
| 中文描述： | 8位132K章字节的闪存数据存储器微控制器 |
| 文件页数： | 3/13页 |
| 文件大小： | 120K |
| 代理商： | AT89S4D12 |
AT89S4D12
4-283
Pin Description
V
CC
Supply voltage.
GND
Ground.
Port 1
Port 1 is a 5-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 (I
IL
) because of the internal pullups.
In addition, P1.0, P1.1, and P1.3 can be configured as the
SPI data output, data input and shift clock input pins, as
shown in the following table.
RST
Reset input. A high on this pin for two machine cycles while
the oscillator is running resets the device.
TEST1
TEST1 is set to V
CC
during downloading of the Flash pro-
gram or data memory. This pin can be left unconnected or
tied to ground during normal operation.
TEST2
Test input. This pin has no user available function and can
be left unconnected or tied to ground.
Special Function Registers
A map of the on-chip memory area called the Special Func-
tion Register (SFR) space is shown in Table 1.
Note that not all of the addresses are occupied, and unoc-
cupied addresses may not be implemented on the chip.
Read accesses to these addresses will in general return
random data, and write accesses will have an indetermi-
nate effect.
User software should not write 1s to these unlisted loca-
tions, since they may be used in future products to invoke
new features. In that case, the reset or inactive values of
the new bits will always be 0.
Memory Control Register
The MCON register contains
the RDY/BSY flag and the most significant Flash address
bit A16, for the 128K bytes of on-chip Flash data memory.
SPI Registers
Control and status bits for the Serial Periph-
eral Interface are contained in registers SPCR (shown in
Table 3) and SPSR (shown in Table 4). The SPI data bits
are contained in the SPDR register. Writing the SPI data
register during serial data transfer sets the Write Collision
bit, WCOL, in the SPSR register. The SPDR is double buff-
ered for writing and the values in SPDR are not changed by
Reset.
Dual Data Pointer Registers
To facilitate data transfer,
two banks of 16-bit Data Pointer Registers are provided:
DP0 at SFR address locations 82H - 83H and DP1 at 84H -
85H. Bit DPS = 0 in SFR MCON selects DP0 and DPS = 1
selects DP1. The user should always initialize the DPS bit
to the appropriate value before accessing the respective
Data Pointer register.
Port Pin
P1.0
P1.1
P1.3
Alternate Functions
SDO (data output pin for SPI channel)
SDI (data input pin for SPI channel)
SCK (clock input pin for SPI channel)
相关PDF资料 |
PDF描述 |
|---|---|
| AT89S4D12-12JC | 8-Bit Microcontroller with 132K Bytes Flash Data Memory |
| AT89S4D12-12JI | 8-Bit Microcontroller with 132K Bytes Flash Data Memory |
| AT89S4D12-12RC | 8-Bit Microcontroller with 132K Bytes Flash Data Memory |
| AT89S4D12-12RI | 8-Bit Microcontroller with 132K Bytes Flash Data Memory |
| AT89S51-24 | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT89S4D12-12RC | 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT89S4D12-12RI | 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT89S51-24AC | 功能描述:8位微控制器 -MCU 4K ISP FLASH 2.7 TO 5.5V - 24 MHZ RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT89S51-24AI | 功能描述:8位微控制器 -MCU 4K ISP FLASH 2.7 TO 5.5V - 24 MHz RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT89S51-24AU | 功能描述:8位微控制器 -MCU 4K ISP FLASH 2.7 TO 5.5V - 24MHz RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。