P87C51MC2 memory Datasheet pdf - extended memory. Equivalent, Catalog

P87C51MB2/P87C51MC2

80C51 8-bit microcontroller family with extended memory;

64 kB/96 kB OTP with 2 kB/3 kB RAM

Rev. 03 — 13 November 2003

Product data

1. General description

The P87C51Mx2 represents the ﬁrst microcontroller based on Philips

Semiconductors’ new 51MX core. The P87C51MC2 features 96 kbytes of OTP

program memory and 3 kbytes of data SRAM, while the P87C51MB2 has 64 kbytes

of OTP and 2 kbytes of RAM. In addition, both devices are equipped with a

Programmable Counter Array (PCA), a watchdog timer that can be conﬁgured to

different time ranges through SFR bits, as well as two enhanced UARTs and Serial

Peripheral Interface (SPI).

Philips Semiconductors’ 51MX (Memory eXtension) core is an accelerated 80C51

architecture that executes instructions at twice the rate of standard 80C51 devices.

The linear address range of the 51MX has been expanded to support up to 8 Mbytes

of program memory and 8 Mbytes of data memory. It retains full program code

compatibility to enable design engineers to re-use 80C51 development tools,

eliminating the need to move to a new, unfamiliar architecture. The 51MX core also

retains 80C51 bus compatibility to allow for the continued use of 80C51-interfaced

peripherals and Application Speciﬁc Integrated Circuits (ASICs).

The P87C51Mx2 provides greater functionality, increased performance and overall

lower system cost. By offering an embedded memory solution combined with the

enhancements to manage the memory extension, the P87C51Mx2 eliminates the

need for software work-around. The increased program memory enables design

engineers to develop more complex programs in a high-level language like C, for

example, without struggling to contain the program within the traditional 64 kbytes of

program memory. These enhancements also greatly improve C Language efﬁciency

for code size below 64 kbytes.

The 51MX core is described in more detail in the 51MX Architecture Reference.

2. Features

2.1 Key features

s Extended features of the 51MX Core:

x 23-bit program memory space and 23-bit data memory space

x Linear program and data address range expanded to support up to 8 Mbytes

each

x Program counter expanded to 23 bits

x Stack pointer extended to 16 bits enabling stack space beyond the 80C51

limitation

Philips Semiconductors

P87C51MB2/P87C51MC2

80C51 8-bit microcontroller family

9397 750 12302

Product data

x New 23-bit extended data pointer and two 24-bit universal pointers greatly

improve C compiler code efﬁciency in using pointers to access variables in

different spaces

s 100% binary compatibility with the classic 80C51 so that existing code is

completely reusable

s Up to 24 MHz CPU clock with 6 clock cycles per machine cycle

s 96 kbytes (MC2) or 64 kbytes (MB2) of on-chip OTP

s 3 kbytes (MC2) or 2 kbytes (MB2) of on-chip RAM

s Programmable Counter Array (PCA)

s Two full-duplex enhanced UARTs and Serial Peripheral Interface (SPI)

communication modules

2.2 Key beneﬁts

s Increases program/data address range to 8 Mbytes each

s Enhances performance and efﬁciency for C programs

s Fully 80C51-compatible microcontroller

s Provides seamless and compelling upgrade path from classic 80C51

s Preserves 80C51 code base, investment/knowledge, and peripherals & ASICs

s Supported by wide range of 80C51 development systems and programming tools

vendors

s The P87C51Mx2 makes it possible to develop applications at lower cost and with

a reduced time-to-market

2.3 Complete features

s Fully static

s Up to 24 MHz CPU clock with 6 clock cycles per machine cycle

s 96 kbytes or 64 kbytes of on-chip OTP

s 3 kbytes or 2 kbytes of on-chip RAM

s 23-bit program memory space and 23-bit data memory space

s Four-level interrupt priority

s 34 I/O lines (5 ports)

s Three Timers: Timer0, Timer1 and Timer2

s Two full-duplex enhanced UARTs with baud rate generator

s Framing error detection

s Automatic address recognition

s Supports industry-standard Serial Peripheral Interface (SPI) with a baud rate up to

6 Mbits/s

s Power control modes

s Clock can be stopped and resumed

s Idle mode

s Power down mode with advanced clock control

s Second DPTR register

s Asynchronous port reset

s Programmable Counter Array (PCA) (compatible with 8xC51Rx+) with ﬁve

Capture/Compare modules

Rev. 03 — 13 November 2003

2 of 36

Philips Semiconductors

P87C51MB2/P87C51MC2

80C51 8-bit microcontroller family

s Low EMI (inhibit ALE)

s Watchdog timer with programmable prescaler for different time ranges

(compatible with 8xC66x with added prescaler)

3. Differences between P87C51MX2/02 part and previous revisions of

P87C51MX2

The P87C51MX2/02 offers several advantages over the previous generation of

P87C51MX2 parts. Right now, SPI module is available, two more general purpose

digital pins on P4 are present and additional power control features are implemented

(advanced peripheral clock control). New memory interface mode and code size

optimization options are available with the use of MXCON register.

No changes are necessary when porting and loading code written for existing

P87C51MX2 to the new P87C51MX2/02.

4. Ordering information

Table 1: Ordering information

Type number

Memory

OTP RAM

Temp

Range

(°C)

VDD voltage Frequency

Package

range

VDD = 2.7 VDD = 4.5 Name Description

to 5.5 V to 5.5 V

Version

P87C51MB2BA/02 64 kB 2048 B 0 to +70 2.7 to 5.5 V 0 to

12 MHz

0 to

24 MHz

PLCC44 plastic leaded SOT187-2

chip carrier;

44 leads

P87C51MC2BA/02 96 kB 3072 B 0 to +70 2.7 to 5.5 V 0 to

12 MHz

0 to

24 MHz

PLCC44 plastic leaded SOT187-2

chip carrier;

44 leads

9397 750 12302

Product data

Rev. 03 — 13 November 2003

3 of 36

extended memory. P87C51MC2 Datasheet

P87C51MC2 memory. Datasheet pdf. Equivalent