參數(shù)資料
型號(hào)： DS80C320
英文描述： High-Speed/Low-Power Micro
中文描述： 高速/低功耗微控制器
文件頁數(shù)： 4/42頁
文件大?。?/td> 1501K
代理商： DS80C320
DS80C320/DS80C323
4 of 42
PIN DESCRIPTION
Table 1
DIP
PLCC
TQFP
40
44
20
22, 23
16, 17
9
10
SIGNAL NAME
V
CC
GND
RST
DESCRIPTION
V
CC
- +5V.
(+3V DS80C323)
GND -
Digital circuit ground.
RST - Input
. The RST input pin contains a Schmitt voltage input to
recognize external active high Reset inputs. The pin also employs an
internal pulldown resistor to allow for a combination of wired OR
external Reset sources. An RC is not required for power-up, as the
device provides this function internally.
XTAL1, XTAL2 -
The crystal oscillator pins XTAL1 and XTAL2
provide support for parallel resonant, AT cut crystals. XTAL1 acts
also as an input in the event that an external clock source is used in
place of a crystal. XTAL2 serves as the output of the crystal
amplifier.
PSEN
- Output
. The Program Store Enable output. This signal is
commonly connected to external ROM memory as a chip enable.
PSEN
will provide an active low pulse width of 2.25 XTAL1 cycles
with a period of four XTAL1 cycles.
PSEN
is driven high when data
memory (RAM) is being accessed through the bus and during a reset
condition.
ALE – Output
. The Address Latch Enable output functions as a
clock to latch the external address LSB from the multiplexed
address/data bus. 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 device is in a Reset condition.
AD0-7 (Port 0) - I/O.
Port 0 is the multiplexed address/data bus.
During the time when ALE is high, the LSB of a memory address is
presented. When ALE falls, 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. The Port 0 has no true port
latch and can not be written directly by software. The reset condition
of Port 0 is high. No pullup resistors are needed.
38
4
18
19
20
21
14
15
XTAL2
XTAL1
29
32
26
PSEN
30
33
27
ALE
39
38
37
36
35
34
33
32
1-8
43
42
41
40
39
38
37
36
2-9
37
36
35
34
33
32
31
30
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
P1.0-P1.7
40-44
1-3
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 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 device 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 once again becomes the
output high (and input) state. The alternate modes of Port 1 are
outlined as follows:
Port
Alternate
Function
P1.0
T2
External I/O for Timer/Counter 2
P1.1
T2EX
Timer/Counter 2 Capture/Reload Trigger
P1.2
RXD1
Serial Port 1 Input
P1.3
TXD1
Serial Port 1 Output
P1.4
INT2
External Interrupt 2 (Positive Edge Detect)
1
2
3
4
5
6
2
3
4
5
6
7
40
41
42
43
44
1
P1.5
P1.6
INT3
INT4
External Interrupt 3 (Negative Edge Detect)
External Interrupt 4 (Positive Edge Detect)
7
8
8
9
2
3
P1.7
INT5
External Interrupt 5 (Negative Edge Detect)
相關(guān)PDF資料
PDF描述
DS80C320-ECG High-Speed/Low-Power Micro
DS80C320-ECL High-Speed/Low-Power Micro
DS80C320-ENG High-Speed/Low-Power Micro
DS80C320-QNL High-Speed/Low-Power Micro
DS80C320-MCG High-Speed/Low-Power Micro
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS80C320_06 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Speed/Low-Power Microcontrollers
DS80C320+ENL 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC ROMLESS 5V 44TQFP - Trays
DS80C320+FCG 制造商:Maxim Integrated Products 功能描述:MICRO HI SPD 44PQFP 25MHZ PB-FREE - Trays
DS80C320+FNG 制造商:Maxim Integrated Products 功能描述:MICRO HS 44MQFP 25MHZ IND PB-FREE - Trays
DS80C320+MCG 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC ROMLESS 5V 40PDIP - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC 8BIT CPU CMOS 80C320 DIP40 制造商:Maxim Integrated Products 功能描述:IC, 8BIT CPU CMOS, 80C320, DIP40 制造商:Maxim Integrated Products 功能描述:IC, 8BIT CPU CMOS, 80C320, DIP40; Controller Family/Series:(8051) 8052; Core Size:8bit; No. of I/O's:32; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Digital IC Case Style:DIP; No. of Pins:40; RAM Memory Size:256Byte; CPU ;RoHS Compliant: Yes
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