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