DS80C310
PRELIMINARY
DS80C310
High–Speed Micro
FEATURES
PACKAGE OUTLINE
P1.0/T2
P1.1/T2EX
P1.2
P1.3
P1.4/INT2
P1.5/INT3
P1.6/INT4
P1.7/INT5
RST
P3.0/RXD0
P3.1/TXD0
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
GND
1
2
3
4
5
6
7
8
40
39
38
37
36
35
34
33
VCC
AD0 (P0.0)
AD1 (P0.1)
AD2 (P0.2)
AD3 (P0.3)
AD4 (P0.4)
AD5 (P0.5)
AD6 (P0.6)
AD7 (P0.7)
EA
ALE
PSEN
A15 (P2.7)
A14 (P2.6)
A13 (P2.5)
A12 (P2.4)
A11 (P2.3)
A10 (P2.2)
A9 (P2.1)
A8 (P2.0)
•
80C32 Compatible
–
–
–
–
–
–
8051 pin and instruction set compatible
Full duplex serial port
Three 16–bit timer/counters
256 bytes scratchpad RAM
Multiplexed address/data bus
Addresses 64KB ROM and 64KB RAM
•
High–Speed Architecture
–
–
–
–
–
4 clocks/machine cycle (8051 = 12)
Runs DC to 33 MHz clock rates
Single–cycle instruction in 121 ns
Dual data pointer
Optional variable length MOVX to access fast/
slow RAM /peripherals
•
10 total interrupt sources with 6 external
•
Internal power on reset circuit
•
Upwardly compatible with the DS80C320
•
Available in 40–pin PDIP, 44–pin PLCC, and
44–pin TQFP
9
32
10
DALLAS
31
11
DS80C310
30
12
29
13
28
14
27
15
26
16
25
17
24
18
23
19
22
20
21
40–PIN DIP
6
1
40
7
39
DALLAS
DS80C310
DESCRIPTION
The DS80C310 is a fast 80C31/80C32 compatible
microcontroller. It features a redesigned processor core
without wasted clock and memory cycles. As a result, it
executes every 8051 instruction between 1.5 and 3
times faster than the original architecture for the same
crystal speed. Typical applications will see a speed
improvement of 2.5 times using the same code and the
same crystal. The DS80C310 offers a maximum crystal
speed of 33 MHz, resulting in apparent execution
speeds of 82.5 MHz (approximately 2.5X).
17
18
33
44–PIN PLCC
28
23
29
34
22
DALLAS
DS80C310
44
12
1
44–PIN TQFP
11
ECopyright
1995 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
031296 1/21
DALLAS [ DALLAS SEMICONDUCTOR ]
