Rainbow Electronics T89C51AC2 - Manual

Rev. B – 19-Dec-01
1
1. Features
• 80C51 core architecture:
– 256 bytes of on-chip RAM
– 1 Kbytes of on-chip ERAM
– 32 Kbytes of on-chip Flash memory
Data Retention: 10 years at 85°C
Read/Write cycle: 10k
– 2 Kbytes of on-chip Flash for Bootloader
– 2 Kbytes of on-chip EEPROM
Read/Write cycle: 100k
– 14-sources 4-level interrupts
– Three 16-bit timers/counters
– Full duplex UART compatible 80C51
– Maximum crystal frequency 40 MHz. In X2 mode, 20 MHz (CPU core, 40 MHz)
– Five ports: 32 + 2 digital I/O lines
– Five-channel 16-bit PCA with:
PWM (8-bit)
High-speed output
Timer and edge capture
– Double Data Pointer
– 21-bit watchdog timer (7 programmable bits)
• A 10-bit resolution analog to digital converter (ADC) with 8 multiplexed inputs
• On-chip emulation Logic (enhanced Hook system)
• Power saving modes:
– Idle mode
– Power down mode
• Power supply: 5V +/- 10% (or 3V** +/- 10%)
• Temperature range: Industrial (-40
° to +85 ° C)
• Packages: TQFP44, PLCC44
Note:
* At BRP = 1 sampling point will be fixed.
** Ask for availability
2. Description
The T89C51AC2 is a high performance FLASH version of the 80C51 single chip 8-bit
microcontrollers. It contains a 32Kbyte Flash memory block for program and data.
The 32K byte FLASH memory can be programmed either in parallel mode or in serial
mode with the ISP capability or with software. The programming voltage is internally
generated from the standard V CC pin.
The T89C51AC2 retains all features of the 80C52 with 256 bytes of internal RAM, a 7-
source 4-level interrupt controller and three timer/counters. In addition, the
T89C51AC2 has a 10 bit A/D converter, a 2Kbytes Boot Flash memory, 2 Kbyte
EEPROM for data, a Programmable Counter Array, an XRAM of 1024 bytes, a Hard-
wa re Wa tch dog Ti m er an d a m ore ve rsati le se ria l c ha nn el tha t fa ci li ta tes
multiprocessor communication (EUART).The fully static design of the T89C51AC2
allows to reduce system power consumption by bringing the clock frequency down to
any value, even DC, without loss of data.
The T89C51AC2 has 2 software-selectable modes of reduced activity and an 8 bit
clock prescaler for further reduction in power consumption. In the idle mode the CPU
is frozen while the peripherals and the interrupt system are still operating. In the
power-down mode the RAM is saved and all other functions are inoperative.
Enhanced 8-bit
MCU with A/D
Converter and
32 Kbytes
T89C51AC2