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参数资料
| 型号： | DS89C440-QNG |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/46页 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 32KB 25MHZ 44-PLCC |
| 标准包装： | 26 |
| 系列： | 89C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 25MHz |
| 连通性： | EBI/EMI，SIO，UART/USART |
| 外围设备： | 电源故障复位，WDT |
| 输入/输出数： | 32 |
| 程序存储器容量： | 32KB（32K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.5 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： | 管件 |
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DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
13 of 46
PIN DESCRIPTION (continued)
PIN
PDIP
PLCC
TQFP
NAME
FUNCTION
1
2
40
P1.0
2
3
41
P1.1
3
4
42
P1.2
4
5
43
P1.3
5
6
44
P1.4
6
7
1
P1.5
7
8
2
P1.6
8
9
3
P1.7
Port 1, I/O. Port 1 functions as both an 8-bit, bidirectional I/O port and an alternate
functional interface for timer 2 I/O, new external interrupts, and new serial port 1. The
reset condition of port 1 is with all bits at logic 1. In this state, a weak pullup holds the port
high. This condition also serves as an input state, since any external circuit that writes to
the port overcomes the weak pullup. When software writes a 0 to any port pin, the
DS89C430/DS89C450 activate a strong pulldown that remains on until either a 1 is
written or a reset occurs. Writing a 1 after the port has been at 0 causes a strong
transition driver to turn on, followed by a weaker sustaining pullup. Once the momentary
strong driver turns off, the port again becomes the output high (and input) state. The
alternate functions of port 1 are as follows:
PORT
ALTERNATE
FUNCTION
P1.0
T2
External I/O for Timer/Counter2
P1.1
T2EX
Timer 2 Capture/Reload Trigger
P1.2
RXD1
Serial Port 1 Receive
P1.3
TXD1
Serial Port 1 Transmit
P1.4
INT2
External Interrupt 2 (Positive Edge Detect)
P1.5
INT3
External Interrupt 3 (Negative Edge Detect)
P1.6
INT4
External Interrupt 4 (Positive Edge Detect)
P1.7
INT5
External Interrupt 5 (Negative Edge Detect)
21
24
18
P2.0 (A8)
22
25
19
P2.1 (A9)
23
26
20
P2.2 (A10)
24
27
21
P2.3 (A11)
25
28
22
P2.4 (A12)
26
29
23
P2.5 (A13)
27
30
24
P2.6 (A14)
28
31
25
P2.7 (A15)
Port 2 (A8–A15), I/O. Port 2 is an 8-bit, bidirectional I/O port. The reset condition of port 2
is logic high. In this state, a weak pullup holds the port high. This condition also serves as
an input mode, since any external circuit that writes to the port overcomes the weak
pullup. When software writes a 0 to any port pin, the DS89C430/DS89C450 activate a
strong pulldown that remains on until either a 1 is written or a reset occurs. Writing a 1
after the port has been at 0 causes a strong transition driver to turn on, followed by a
weaker sustaining pullup. Once the momentary strong driver turns off, the port again
becomes both the output high and input state. As an alternate function, port 2 can function
as the MSB of the external address bus when reading external program memory and
read/write external RAM or peripherals. In page mode 1, port 2 provides both the MSB and
LSB of the external address bus. In page mode 2, it provides the MSB and data.
10
11
5
P3.0
11
13
7
P3.1
12
14
8
P3.2
13
15
9
P3.3
14
16
10
P3.4
15
17
11
P3.5
16
18
12
P3.6
17
19
13
P3.7
Port 3, I/O. Port 3 functions as both an 8-bit, bidirectional I/O port and an alternate
functional interface for external interrupts, serial port 0, timer 0 and 1 inputs, and RD and
WR
strobes. The reset condition of port 3 is with all bits at a logic 1. In this state, a weak
pullup holds the port high. This condition also serves as an input mode, since any external
circuit that writes to the port overcomes the weak pullup. When software writes a 0 to any
port pin, the DS89C430/DS89C450 activate a strong pulldown that remains on until either
a 1 is written or a reset occurs. Writing a 1 after the port has been at 0 causes a strong
transition driver to turn on, followed by a weaker sustaining pullup. Once the momentary
strong driver turns off, the port again becomes both the output high and input state. The
alternate modes of port 3 are as follows:
PORT
ALTERNATE
FUNCTION
P3.0
RXD0
Serial Port 0 Receive
P3.1
TXD0
Serial Port 0 Transmit
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
31
35
29
EA
External Access. Allows selection of internal or external program memory. Connect to
ground to force the DS89C430/DS89C450 to use an external memory program memory.
The internal RAM is still accessible as determined by register settings. Connect to VCC to
use internal flash memory.
相关PDF资料 |
PDF描述 |
|---|---|
| DS89C440-MNL | IC MCU FLASH 32KB 33MHZ 40-DIP |
| DS89C440-MNG | IC MCU FLASH 32KB 25MHZ 40-DIP |
| DS89C440-ENL | IC MCU FLASH 32KB 33MHZ 44-TQFP |
| DS89C440-ENG | IC MCU FLASH 32KB 25MHZ 44-TQFP |
| MC9S08GT60ACBE | IC MCU 60K FLASH 4K RAM 42-SDIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS89C440-QNL | 功能描述:IC MCU FLASH 32KB 33MHZ 44-PLCC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:89C 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:260 系列:73S12xx 核心处理器:80515 芯体尺寸:8-位 速度:24MHz 连通性:I²C，智能卡，UART/USART，USB 外围设备:LED，POR，WDT 输入/输出数:9 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-VFQFN 裸露焊盘 包装:管件 |
| DS89C440-QNL+ | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers |
| DS89C440-XXX | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers |
| DS89C450 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers |
| DS89C450+ENG | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 44TQFP - Trays |
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