- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376983 > DS87C530-QNL EPROM MICRO WITH REAL TIME CLOCK PDF資料下載
參數(shù)資料
| 型號： | DS87C530-QNL |
| 英文描述： | EPROM MICRO WITH REAL TIME CLOCK |
| 中文描述： | 微型存儲(chǔ)器與實(shí)時(shí)時(shí)鐘 |
| 文件頁數(shù)： | 3/40頁 |
| 文件大?。?/td> | 435K |
| 代理商： | DS87C530-QNL |
第1頁第2頁當(dāng)前第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
DS87C530
022197 3/40
PIN DESCRIPTION
Table 1
PLCC
TQFP
SIGNAL
NAME
DESCRIPTION
52
45
V
CC
V
CC
– +5V
. Processor power supply.
1,25
18, 46
GND
GND
– Processor digital circuit ground.
29
22
V
CC2
V
CC2
– +5V Real Time Clock supply.
26
19
GND2
GND2
– Real Time Clock circuit ground.
12
5
RST
RST – Input
. The RST input pin contains a Schmitt voltage input to recognize
external active high Reset inputs. The pin also employs an internal pull–down
resistor to allow for a combination of wired OR external Reset sources. An RC
is not required for power–up, as the DS87C530 provides this function internally.
23
24
16
17
XTAL2
XTAL1
XTAL1, XTAL2
– The crystal oscillator pins XTAL1 and XTAL2 provide support
for parallel resonant, AT cut crystals. XTAL1 acts also as an input if there is an
external clock source in place of a crystal. XTAL2 serves as the output of the
crystal amplifier.
38
31
PSEN
PSEN – Output
. The Program Store Enable output. This signal is commonly
connected to optional external ROM memory as a chip enable. PSEN will pro-
vide an active low pulse and is driven high when external ROM is not being
accessed.
39
32
ALE
ALE – Output
. The Address Latch Enable output functions as a clock to latch
the external address LSB from the multiplexed address/data bus on Port 0.
This signal is commonly connected to the latch enable of an external 373 family
transparent latch. ALE has a pulse width of 1.5 XTAL1 cycles and a period of
four XTAL1 cycles. ALE is forced high when the DS87C530 is in a Reset condi-
tion. ALE can be disabled by writing ALEOFF=1 (PMR.Z). When ALEOFF=1,
ALE is forced high. ALE operates independently of ALEOFF during external
memory accesses.
50
49
48
47
46
45
44
43
43
42
41
40
39
38
37
36
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
Port 0 (AD0–7) – I/O
. Port 0 is an open–drain 8–bit bi–directional I/O port. As
an alternate function Port 0 can function as the multiplexed address/data bus
to access off–chip memory. During the time when ALE is high, the LSB of a
memory address is presented. When ALE falls to a logic 0, the port transitions
to a bi–directional data bus. This bus is used to read external ROM and read/
write external RAM memory or peripherals. When used as a memory bus, the
port provides active high drivers. The reset condition of Port 0 is tri–state.
Pull–up resistors are required when using Port 0 as an I/O port.
3–10
48–52,
1–3
P1.0 – P1.7
Port 1 – I/O
. Port 1 functions as both an 8–bit bi–directional 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 a logic 1. In this state,
a weak pull–up 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
pull–up. When software writes a 0 to any port pin, the DS87C530 will activate
a strong pull–down 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 pull–up. Once the momentary strong
driver turns off, the port again becomes the output high (and input) state. The
alternate modes of Port 1 are outlined as follows.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS87C550 | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QCL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FCL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-KCL | EPROM High-Speed Micro with A/D and PWM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS87C530-QNL+ | 功能描述:8位微控制器 -MCU EPROM MCU w/RTC 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(chǔ)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 |
| DS87C530Z+ECL | 制造商:Maxim Integrated Products 功能描述:MICRO OTP RTC 33MHZ 52P TQFP PB-FRR - Trays |
| DS87C550 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。