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参数资料
| 型号： | DS87C520-MCL |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, OTPROM, MICROCONTROLLER, PDIP40 |
| 封装： | 0.600 INCH, PLASTIC, DIP-40 |
| 文件页数： | 38/42页 |
| 文件大小： | 832K |
| 代理商： | DS87C520-MCL |
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DS87C520/DS83C520
5 of 42
DIP
PLCC
TQFP
SIGNAL
NAME
DESCRIPTION
21
22
23
24
25
26
27
28
24
25
26
27
28
29
30
31
18
19
20
21
22
23
24
25
P2.0 (A8)
P2.1 (A9)
P2.2(A10)
P2.3(A11)
P2.4(A12)
P2.5(A13)
P2.6(A14)
P2.7(A15)
Port 2 (A8-15) - I/O. Port 2 is a bi-directional 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 will overcome the weak pullup. When software
writes a 0 to any port pin, the DS87C520/DS83C520 will
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 will cause 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 MSB of the external
address bus. This bus can be used to read external ROM
and read/write external RAM memory or peripherals.
10-17
10
11
12
13
14
15
16
17
11,
13-19
11
13
14
15
16
17
18
19
5, 7-13
5
7
8
9
10
11
12
13
P3.0-P3.7
Port 3 - I/O. Port 3 functions as both an 8-bit bi-
directional 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 will
overcome the weak pullup. When software writes a 0 to
any port pin, the DS87C520/DS83C520 will 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
will cause 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
outlined below.
Port
Alternate Mode
P3.0
RXD0
Serial Port 0 Input
P3.1
TXD0
Serial Port 0 Output
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
EA
-
Input.
Connect to ground to force the
DS87C520/DS83C520 to use an external ROM. The
internal RAM is still accessible as determined by register
settings. Connect EA to VCC to use internal ROM.
-12
34
6
28
NC
NC - Reserved. These pins should not be connected. They
are reserved for use with future devices in this family.
相关PDF资料 |
PDF描述 |
|---|---|
| DS87C520-QNL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44 |
| DS87C520-QCL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44 |
| DS87C520-ECL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44 |
| DS87C520-MNL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDIP40 |
| DS87C520-ENL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS87C520-MCL+ | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-MNL | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-MNL+ | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-QCL | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-QCL/T&R | 制造商:Maxim Integrated Products 功能描述:MICRO,OTP,HI SPD 44PLCC 33MHZ TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MCU EPROM/ROM 33MHZ HS 44PLCC |
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