Features: · 80C51 Central Processing Unit (CPU)
· 64 kbytes ROM (only P83C557E8)
· 64 kbytes EPROM (only P87C557E8)
· ROM/EPROM Code protection
· 2048 bytes RAM, expandable externally to 64 kbytes
· Two standard 16-bit timers/counters
· An additional 16-bit timer/counter coupled to four
capture registers and three compare registers
· A 10-bit Analog-to-Digital Converter (ADC) with eight
multiplexed analog inputs and programmable autoscan
· Two 8-bit resolution, Pulse Width Modulation outputs
· Five 8-bit I/O ports plus one 8-bit input port shared with analog inputs
· I2C-bus serial I/O port with byte oriented master and slave functions
· Full-duplex UART compatible with the standard 80C51
· On-chip Watchdog Timer
· 15 interrupt sources with 2 priority levels (2 to 6 external sources possible)
· Phase-Locked Loop (PLL) oscillator with 32 kHz
reference and software-selectable system clock frequency
· Seconds timer
· Software enable/disable of ALE output pulse
· Electromagnetic compatibility improvements
· Wake-up from Power-down by external or seconds interrupt
· Frequency range for 80C51-family standard oscillator: 3.5 to 16 MHz
· Extended temperature range: -40 to +85 C
· Supply voltage: 4.5 to 5.5 V.Pinout
Specifications
| SYMBOL |
PARAMETER |
MIN. |
MAX. |
UNIT |
| VDD |
voltage on VDD to VSS and SCL, SDA to VSS |
-0.5 |
+6.5 |
V |
| VI |
input voltage on:
any other pin to VSS
EA/VPP to VSS |
-0.5
-0.5 |
VDD + 0.5
+13 |
V
V |
| II, IO |
input/output current on any I/O pin |
- |
±10 |
mA |
| Ptot |
total power dissipation (note 2) |
- |
1.0 |
W |
| Tstg |
storage temperature range |
-65 |
+150 |
°C |
| Tamb |
operating ambient temperature range:
P8xC557E8EFB |
-40 |
+85 |
°C |
Notes
1. The following applies to the Absolute Maximum Ratings:
a) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This
is a stress rating only and functional operation of the device at these or any conditions other than those described
in the Chapters 21 and 22 of this specification is not implied.
b) This product includes circuitry specifically designed for the protection of its internal devices from the damaging
effect of excessive static charge. However, its suggested that conventional precautions be taken to avoid
applying greater than the rated maxima.
c) Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect
to VSS unless otherwise noted.
2. This value is based on the maximum allowable die temperature and the thermal resistance of the package, not on
device power consumption.DescriptionThe 8-bit microcontrollers P80C557E8, P83C557E8 and P87C557E8 - hereafter referred to as P8xC557E8 - are manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family.
The P8xC557E8 contains a volatile 2048 bytes read/write Data Memory, five 8-bit I/O ports, one 8-bit input port, two 16-bit timer/event counters (identical to the timers of the 80C51), an additional 16-bit timer coupled to capture and compare latches, a 15-source, two-priority-level, nested interrupt structure, an 8-input ADC, a dual Digital-to-Analog Convertor (DAC), Pulse Width Modulated interface, two serial interfaces (UART and I2C-bus), a Watchdog Timer, an on-chip oscillator and timing circuits.The P8xC557E8 is available in 3 versions:
· P80C557E8: ROMless version
· P83C557E8: containing a non-volatile 64 kbytes mask programmable ROM
· P87C557E8: containing 64 kbytes programmable EPROM/OTP.
The P8xC557E8 is a control-oriented CPU with on-chip Program and Data Memory; it cannot be extended with external Program Memory. P8xC557E8 can access up to 64 kbytes of external Data Memory. For systems requiring extra capability, the P8xC557E8 can be expanded using standard TTL compatible memories and peripherals. In addition, the P8xC557E8 has two software selectable reduced power modes: Idle mode of P8xC557E8 and Power-down mode. The Idle mode freezes the CPU while allowing the RAM, timers, serial ports, and interrupt system to continue functioning. The Power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative.The Power-down mode can be terminated by an external reset, by the seconds interrupt and by any one of the two external interrupts; see Section 15.3.
P8xC557E8 also functions as an arithmetic processor having facilities for both binary and BCD arithmetic as well as bit-handling capabilities. The instruction set of the P8xC557E8 is the same as the 80C51 and consists of over 100 instructions: 49 one-byte, 45 two-byte, and 17 three-byte. With a 16 MHz system clock, 58% of the instructions are executed in 0.75 ms and 40% in 1.5 ms. Multiply and divide instructions require 3 ms.
P8xC557E8 Data Sheet
