TS80C51U2
TS83C51U2
TS87C51U2
Double UART 8-bit CMOS Microcontroller
1. Description
TS80C51U2 is high performance CMOS ROM, OTP The fully static design of the TS80C51U2 allows to
and EPROM versions of the 80C51 CMOS single chip reduce system power consumption by bringing the clock
8-bit microcontroller.
frequency down to any value, even DC, without loss of
data.
The TS80C51U2 retains all features of the 80C51 with
extended ROM/EPROM capacity (16 Kbytes), 256 bytes The TS80C51U2 has 2 software-selectable modes of
reduced activity for further reduction in power
consumption. In the idle mode the CPU is frozen while
the timers, the serial port and the interrupt system are still
operating. In the power-down mode the RAM is saved
and all other functions are inoperative.
of internal RAM, a 7-source , 4-level interrupt system,
an on-chip oscilator and three timer/counters.
In addition, the TS80C51U2 has a second UART,
enhanced functions on both UART, enhanced timer 2,
a hardware watchdog timer, a dual data pointer, a baud
rate generator and a X2 speed improvement mechanism.
2. Features
● 80C52 Compatible
● Asynchronous port reset
● Interrupt Structure with
•
•
•
•
8051 pin and instruction compatible
Four 8-bit I/O ports
•
•
7 Interrupt sources
4 level priority interrupt system
Three 16-bit timer/counters
256 bytes scratchpad RAM
● Full duplex Enhanced UARTs
•
•
Framing error detection
● High-Speed Architecture
Automatic address recognition
•
•
40 MHz @ 5V, 30MHz @ 3V
● Low EMI (inhibit ALE)
● Power Control modes
X2 Speed Improvement capability (6 clocks/
machine cycle)
30 MHz @ 5V, 20 MHz @ 3V (Equivalent to
60 MHz @ 5V, 40 MHz @ 3V)
•
•
•
Idle mode
Power-down mode
Power-off Flag
● Second UART
● Baud Rate Generator
● Dual Data Pointer
● Once mode (On-chip Emulation)
● Power supply: 4.5-5.5V, 2.7-5.5V
● On-chip ROM/EPROM (16K-bytes)
● Temperature ranges: Commercial (0 to 70oC) and
● Programmable Clock Out and Up/Down Timer/
Industrial (-40 to 85oC)
Counter 2
● Packages: PDIL40, PLCC44, VQFP44 1.4, CQPJ44
● Hardware Watchdog Timer (One-time enabled with
(window), CDIL40 (window)
Reset-Out)
3. The second UART
In this document, UART_0 will make reference to the The second UART (UART_1) can be seen as an alternate
first UART (present in all Atmel Wireless function of Port 1 (P1.2 or P1.6 for RXD1 and P1.3 or
&
Microcontrollers C51 derivatives) and UART_1 will P1.7 for TXD1) or can be connected to (pin6 or pin12)
make reference to the second UART, only present in and (pin28 or pin34) of 44-pin package (see Pin
the TS80C51U2 part.
Rev. D - 15 January, 2001
1