1 Description
The MPC82G516A is a single-chip microcontroller based on a high performance 1-T architecture 80C51 CPU
that executes instructions in 1~7 clock cycles (about 6~7 times the rate of a standard 8051 device), and has an
8051 compatible instruction set. Therefore at the same performance as the standard 8051, the MPC82G516A
can operate at a much lower speed and thereby greatly reduce the power consumption.
The MPC82G516A has 64K bytes of embedded Flash memory for code and data. The Flash memory can be
programmed either in parallel mode or in serial mode with the In-System Programming (ISP) and In-Circuit
Programming (ICP) capability. And, it also provides the In-Application Programming (IAP) capability. ISP and ICP
allow the user to download new code without removing the microcontroller from the actual end product; IAP
means that the device can write non-volatile data in the Flash memory while the application program is running.
There needs no external high voltage for programming due to its built-in charge-pumping circuitry.
In addition to the standard features of an 8051 MCU (such as 256 bytes scratch-pad RAM, four 8-bit I/O ports,
three timer/counters, full-duplex serial port and a multi-source 4-level interrupt controller), many system-level
functions have been incorporated into the MPC82G516A. The functions are on-chip 1024 bytes expanded RAM
(XRAM), an extra I/O port (P4), 10-bit ADC, PCA, SPI, secondary UART, keypad interrupt, one-time enabled
Watchdog Timer, and so forth. These additional functions greatly reduce the discrete component, board space
and system cost, and also make the MPC82G516A become a powerful microcontroller for a wide range of
applications.
The MPC82G516A has two power-saving modes and an 8-bit system clock prescaler to reduce the 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 and SFRs’ value are saved and all other functions are inoperative; most
importantly, in the Power-down mode the device can be waked up by the external interrupts. And, the user can
further reduce the power consumption by using the 8-bit system clock prescaler to slow down the operating
speed.
Additionally, the MPC82G516A is equipped with the Megawin proprietary On-Chip Debug (OCD) interface for In-
Circuit Emulator (ICE). The OCD interface provides on-chip and in-system non-intrusive debugging without any
target resource occupied. Several operations necessary for an ICE are supported such as Reset, Run, Stop,
Step, Run to Cursor and Breakpoint Setting. The user has no need to prepare any development board during
firmware developing or the socket adapter used in the traditional ICE probe head. All the thing the user needs to
do is to prepare a 4-pin connector for the dedicated OCD interface. This powerful feature make the developing
very easy for any user.
MEGAWIN
MPC82G516A Data Sheet
8
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
