參數(shù)資料
型號： DS87C520-ENL
廠商： Maxim Integrated Products
文件頁數(shù)： 40/43頁
文件大?。?/td> 0K
描述： IC MCU EPROM/ROM 33MH IND 44TQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
產(chǎn)品變化通告： Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝： 160
系列： 87C
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設(shè)備： 電源故障復(fù)位，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 16KB（16K x 8）
程序存儲器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-TQFP
包裝： 托盤
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
6 of 43
PIN DESCRIPTION (continued)
PIN
DIP
PLCC
TQFP
NAME
FUNCTION
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 (A8–15), I/O. Port 2 is a 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 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
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 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
External Access Input, Active Low. 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
N.C.
Not Connected. These pins should not be connected. They are
reserved for use with future devices in this family.
相關(guān)PDF資料
PDF描述
DS87C530-ECL+ IC MCU EPR/ROM W/RTC 33MZ 52TQFP
DS87C530-KCL IC MCU EPR/ROM W/RTC 33MZ 52CLCC
DS87C550-QCL+ IC MCU EPROM ADC/PWM HS 68-PLCC
DS89C450-ENL IC MCU FLASH 64KB 33MHZ 44-TQFP
DS9034PCI IC SRAM NV TIMEKEEPING POWERCAP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C520-ENL+ 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)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(fēng)格:SMD/SMT
DS87C520-FCL 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
DS87C520MCL 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM High-Speed Microcontrollers
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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)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(fēng)格:SMD/SMT
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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)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(fēng)格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*