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參數(shù)資料
| 型號： | DS80C323MCG |
| 英文描述： | Microprocessor |
| 中文描述： | 微處理器 |
| 文件頁數(shù)： | 5/38頁 |
| 文件大?。?/td> | 434K |
| 代理商： | DS80C323MCG |
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DS80C320/DS80C323
110196 5/38
DIP
21
22
23
24
25
26
27
28
DESCRIPTION
SIGNAL
NAME
A8 (P2.0)
A9 (P2.1)
A10 (P2.2)
A11 (P2.3)
A12 (P2.4)
A13 (P2.5)
A14 (P2.6)
A15 (P2.7)
TQFP
18
19
20
21
22
23
24
25
PLCC
24
25
26
27
28
29
30
31
A15–A8 (Port 2) – Output
. Port 2 serves as the MSB for external
addressing. P2.7 is A15 and P2.0 is A8. The device will automatically
place the MSB of an address on P2 for external ROM and RAM
access. Although Port 2 can be accessed like an ordinary I/O port, the
value stored on the Port 2 latch will never be seen on the pins (due
to memory access). Therefore writing to Port 2, in software is only
useful for the instructions MOVX A, @Ri or MOVX @Ri, A. These
instructions use the Port 2 internal latch to supply the external
address MSB. In this case, the Port 2 latch value will be supplied as
the address information.
10–
17
11,
13–19
5, 7–13
P3.0–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 & 1 Inputs, RD and WR strobes. The reset condition of Port
3 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 device 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 once again becomes both
the output high and input state. The alternate modes of Port 3 are out-
lined below:
10
11
12
13
14
15
16
17
11
13
14
15
16
17
18
19
5
7
8
9
10
11
12
13
Port
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
Alternate Mode
RXD0
TXD0
INT0
INT1
T0
T1
WR
RD
Serial Port 0 Input
Serial Port 0 Output
External Interrupt 0
External Interrupt 1
Timer 0 External Input
Timer 1 External Input
External Data Memory Write Strobe
External Data Memory Read Strobe
31
35
29
EA
EA – Input.
This pin must be connected to ground for proper opera-
tion.
–
12
34
1
6
28
39
NC
NC – Reserved.
These pins should not be connected. They are
reserved for use with future devices in this family.
–
NC – Reserved.
These pins are reserved for additional ground pins
on future products.
80C32 COMPATIBILITY
The DS80C320/DS80C323 is a CMOS 80C32 compat-
ible microcontroller designed for high performance. In
most cases it will drop into an existing 80C32 design to
significantly improve the operation. Every effort has
been made to keep the device familiar to 8032 users, yet
it has many new features. In general, software written
for existing 80C32 based systems will work on the
DS80C320/DS80C323. The exception is critical timing
since the High–Speed Microcontroller performs its
instructions much faster than the original. It may be nec-
essary to use memories with faster access times if the
same crystal frequency is used.
The DS80C320/DS80C323 runs the standard 8051
instruction set and is pin compatible with an 80C32 in
any of three standard packages. It also provides the
same timer/counter resources, full–duplex serial port,
256 bytes of scratchpad RAM and I/O ports as the stan-
dard 80C32. Timers will default to a 12 clock per cycle
operation to keep timing compatible with original 8051
systems. However, they can be programmed to run at
the new 4 clocks per cycle if desired.
New hardware features are accessed using Special
Function Registers that do not overlap with standard
80C32 locations. A summary of these SFRs is provided
below.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS80C323QCG | Microprocessor |
| DS80C390 | Dual CAN High-Speed Microprocessor |
| DS80C390-QNR | Dual CAN High-Speed Microprocessor |
| DS80C390-FCR | Dual CAN High-Speed Microprocessor |
| DS80C390-FNR | Dual CAN High-Speed Microprocessor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS80C323-MCG | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
| DS80C323-MCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
| DS80C323-MCR | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
| DS80C323-MED | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS80C323-MND | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
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