Energy Meter IC Family Software Instruction Manual

71M652X Software User’s Guide

Revision 1.7 TERIDIAN Proprietary 102 of 138

6.1.2 80515 Features

Below is a summary of the 80515 features:

♦ Control Unit

 8-bit instruction decoder

 Reduced instruction cycle time up to 12 times

♦ Arithmetic-Logic Unit

 8 bit arithmetic and logical operations

 Boolean manipulations

 8 x 8 bit multiplication and 8 / 8 bit division

♦ 32-bit Input/Output ports

 Four 8-bit I/O ports

 Alternate port functions such as external interrupts and serial interfaces are separated, providing

extra port pins when compared with the standard 8051

♦ Two 16-bit Timer/Counters

♦ Two Serial Peripheral Interfaces in full duplex mode, capable of parity generation

 Synchronous mode, fixed baud rate, Serial 0 only

 8-bit UART mode, variable baud rate

 9-bit UART mode, fixed baud rate, Serial 0 only

 9-bit UART mode, variable baud rate

 7E1, 7O1, 7N2, 7E2, 7O2, 8N1, 8E1, 8O1, 8N2, 9N1 data formats supported

 Two Internal baud rate generators independent from timers

♦ Interrupt Controller

 Four priority levels with 11 interrupt sources

♦ 15 bit Programmable Watchdog Timer

♦ Internal Data Memory interface

 Can address up to 256B of internal data memory space

♦ External Memory interface

 Can address up to 64kB of external program memory (32KB, 16KB or 8KB provided on-chip)

 Can address up to 2kB of external data memory plus 512 bytes CE DRAM

 Separate address/data bus to allow easy connection to memories

 Variable length code fetch and MOVC to access fast/slow program memory

 Variable length MOVX to access fast/slow RAM or peripherals

 Dual data pointer for fast data block transfer

♦ Special Function Registers interface

 Services up to 74 external special function registers