
2
Rev. A - May 7, 1999
TSC80251G2D
3. Features
G
 Pin and Software Compatibility with Standard 80C51
Products and 80C51Fx/Rx/Rx+
G
 Plug-In Replacement of Intel’s 8xC251Sx
G
 C251 core: Intel’s MCS
251 D-step Compliance
40-byte register file
Registers accessible as Bytes, Words or Dwords
Three-stage instruction pipeline
16-bit internal code fetch
G
 Enriched C51 Instruction Set
16-bit and 32-bit ALU
Compare and conditional jump instructions
Expanded set of move instructions
G
 Linear Addressing
G
 1 Kbyte of On-Chip RAM
G
 External Memory Space (Code/Data) Programmable
from 64 Kbytes to 256 Kbytes
G
 TSC87251G2D: 32 Kbytes of On-Chip EPROM/
OTPROM
SINGLE PULSE Programming Algorithm
G
 TSC83251G2D: 32 Kbytes of On-Chip Masked ROM
G
 TSC80251G2D: ROMless Version
G
 Four 8-bit Parallel I/O Ports (Ports 0, 1, 2 and 3 of
the standard 80C51)
I/O
Port:
full
compatible) with independent Baud Rate Generator
G
 Serial
duplex
UART
(80C51
G
 SSLC: Synchronous Serial Link Controller
I
2
C multi-master protocol
μ
Wire and SPI master and slave protocols
G
 Three 16-bit Timers/Counters (Timers 0, 1 and 2 of
the standard 80C51)
G
 EWC: Event and Waveform Controller
Compatible with Intel’s Programmable Counter
Array (PCA)
Common 16-bit timer/counter reference with four
possible clock sources (Fosc/4, Fosc/12, Timer 1
and external input)
Five modules, each with four programmable
modes:
-
16-bit software timer/counter
-
16-bit
timer/counter
software pulse measurement
-
High-speed output and 16-bit software pulse
width modulation (PWM)
-
8-bit hardware PWM without overhead
capture
input
and
16-bit watchdog timer/counter capability
G
 Secure 14-bit Hardware Watchdog Timer
G
 Power Management
Power-On reset (integrated on the chip)
Power-Off flag (cold and warm resets)
Software programmable system clock
Idle mode
Power-Down mode
G
 Keyboard Interrupt Interface on Port 1
G
 Non Maskable Interrupt Input (NMI)
G
 Real-Time Wait States Inputs (WAIT#/AWAIT#)
G
 ONCE mode and full speed Real-Time In-Circuit
Emulation support (Third Party Vendors)
G
 High Speed Versions:
4.5 to 5.5 V
16 MHz and 24 MHz
Typical operating current: 35 mA @ 24 MHz
24 mA @ 16 MHz
Typical power-down current: 2
 μ
A
G
 Low Voltage Version:
2.7 to 5.5 V
16 MHz
Typical operating current: 11 mA @ 3V
Typical power-down current: 1
 μ
A
G
 Temperature Ranges:
Commercial (0
°
C to +70
°
C)
Industrial (-40
°
C to +85
°
C)
Option: extended range (-55
°
C to +125
°
C)
G
 Packages:
PDIL 40, PLCC 44 and VQFP 44
CDIL 40 and CQPJ 44 with window
Options: known good dice and ceramic packages