This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

C8051F85x/86x

Low-Cost 8-bit MCU Family with up to 8 kB of Flash

Memory

Up to 8 kB flash

- Flash is in-system programmable in 512-Byte sectors

- Up to 512 Bytes RAM (256 + 256)

On-Chip Debug

On-chip debug circuitry facilitates full speed, non-intrusive in-

system debug (no emulator required)

- Provides breakpoints, single stepping, inspect/modify memory

and registers

12-Bit Analog-to-Digital Converter

Up to 16 input channels

- Up to 200 ksps 12-bit mode or 800 ksps 10-bit mode

- Internal VREF or external VREF supported

Internal Low-Power Oscillator

Calibrated to 24.5 MHz

- Low supply current

- ±2% accuracy over supply and temperature

Internal Low-Frequency Oscillator

80 kHz nominal operation

- Low supply current

- Independent clock source for watchdog timer

2 Analog Comparators

Programmable hysteresis and response time

- Configurable as interrupt or reset source

- Low current

Additional Support Peripherals

Independent watchdog timer clocked from LFO

- 16-bit CRC engine

High-Speed CIP-51 µC Core

Efficient, pipelined instruction architecture

- Up to 25 MIPS throughput with 25 MHz clock

- Uses standard 8051 instruction set

- Expanded interrupt handler

General-Purpose I/O

Up to 18 pins

- 5 V-Tolerant

- Crossbar-enabled

Communication Peripherals

UART

- I

C / SMBus™

- SPI™

Timer/Counters and PWM

4 General-Purpose 16-bit Timer/Counters

- 16-bit Programmable Counter Array (PCA) with three channels

of PWM, capture/compare, or frequency output capability, and

hardware kill/safe state capability

Supply Voltage

2.2 to 3.6 V

Package Options

16-pin SOIC

- 20-pin QFN, 3 x 3 mm

- 24-pin QSOP

- Available in die form

- Qualified to AEC-Q100 Standards

Temperature Ranges:

- –40 to +125 °C (-Ix) and –40 to +85 °C (-Gx)

CIP-51

(25 MHz)

2-8 kB Flash

256-512 B RAM

Watchdog

Supply Monitor

Core / Memory / Support

C2 Serial Debug / Programming

Core LDO

Clocking / Oscillators

80 kHz Low Frequency Oscillator

24.5 MHz Low Power Oscillator

External Clock (CMOS Input)

Clock Selection

Analog Peripherals

SAR ADC

(12-bit 200 ksps,10-bit 800 ksps)

2 x Low Current Comparators

Digital Peripherals

UART

4 x 16-bit Timers

3-Channel PCA

Voltage Reference

Flexible Pin Muxing

Priority Crossbar

Encoder

18 Multi-Function 5V-Tolerant I/O Pins

I2C / SMBus

SPI

16-bit CRC

C8051F85x/86x

2 Preliminary Rev 0.6

Table of Contents

1. Electrical Specifications......................................................................................................7

1.1. Electrical Characteristics ................................................................................................7

1.2. Typical Power Curves ..................................................................................................17

1.2.1. Operating Supply Current....................................................................................17

1.2.2. ADC Supply Current ............................................................................................18

1.3. Thermal Conditions ......................................................................................................19

1.4. Absolute Maximum Ratings..........................................................................................19

2. System Overview ...............................................................................................................20

2.1. Power ...........................................................................................................................22

2.1.1. LDO ..................................................................................................................22

2.1.2. Voltage Supply Monitor (VMON0) .......................................................................22

2.1.3. Device Power Modes...........................................................................................22

2.2. I/O.................................................................................................................................23

2.2.1. General Features.................................................................................................23

2.2.2. Crossbar ..............................................................................................................23

2.3. Clocking........................................................................................................................24

2.4. Counters/Timers and PWM ..........................................................................................24

2.4.1. Programmable Counter Array (PCA0) .................................................................24

2.4.2. Timers (Timer 0, Timer 1, Timer 2 and Timer 3)..................................................24

2.4.3. Watchdog Timer (WDT0).....................................................................................24

2.5. Communications and other Digital Peripherals ............................................................25

2.5.1. Universal Asynchronous Receiver/Transmitter (UART0) ....................................25

2.5.2. Serial Peripheral Interface (SPI0) ........................................................................25

2.5.3. System Management Bus / I2C (SMBus0) ..........................................................25

2.5.4. 16/32-bit CRC (CRC0).........................................................................................25

2.6. Analog Peripherals .......................................................................................................26

2.6.1. 12-Bit Analog-to-Digital Converter (ADC0) ..........................................................26

2.6.2. Low Current Comparators (CMP0, CMP1) ..........................................................26

2.7. Reset Sources..............................................................................................................27

2.8. On-Chip Debugging......................................................................................................27

3. Pin Definitions....................................................................................................................28

3.1.

C8051F850/1/2/3/4/5 QSOP24 Pin Definitions ............................................................28

3.2. C8051F850/1/2/3/4/5 QFN20 Pin Definitions ...............................................................31

3.3. C8051F860/1/2/3/4/5 SOIC16 Pin Definitions..............................................................34

4. Ordering Information.........................................................................................................37

5. QSOP-24 Package Specifications ....................................................................................39

6. QFN-20 Package Specifications .......................................................................................41

7. SOIC-16 Package Specifications ......................................................................................44

8. Memory Organization ........................................................................................................46

8.1. Program Memory..........................................................................................................47

8.1.1. MOVX Instruction and Program Memory.............................................................47

8.2. Data Memory................................................................................................................47

8.2.1. Internal RAM........................................................................................................47

8.2.2. External RAM.......................................................................................................48

C8051F85x/86x

Preliminary Rev 0.6 3

8.2.3. Special Function Registers ..................................................................................48

9. Special Function Register Memory Map..........................................................................49

10.Flash Memory.....................................................................................................................54

10.1.Security Options...........................................................................................................54

10.2.Programming The Flash Memory ................................................................................56

10.2.1.Flash Lock and Key Functions ............................................................................56

10.2.2.Flash Erase Procedure........................................................................................56

10.2.3.Flash Write Procedure.........................................................................................56

10.3.Non-volatile Data Storage............................................................................................57

10.4.Flash Write and Erase Guidelines ...............................................................................57

10.4.1.Voltage Supply Maintenance and the Supply Monitor.........................................57

10.4.2.PSWE Maintenance ............................................................................................57

10.4.3.System Clock.......................................................................................................58

10.5.Flash Control Registers ...............................................................................................59

11.Device Identification ..........................................................................................................62

11.1.Device Identification Registers.....................................................................................62

12.Interrupts ............................................................................................................................65

12.1.MCU Interrupt Sources and Vectors ............................................................................65

12.1.1.Interrupt Priorities ................................................................................................65

12.1.2.Interrupt Latency..................................................................................................65

12.2.Interrupt Control Registers...........................................................................................67

13.Power Management and Internal Regulator ....................................................................74

13.1.Power Modes ...............................................................................................................74

13.1.1.Idle Mode.............................................................................................................74

13.1.2.Stop Mode ...........................................................................................................75

13.2.LDO Regulator.............................................................................................................75

13.3.Power Control Registers..............................................................................................75

13.4.LDO Control Registers.................................................................................................76

14.Analog-to-Digital Converter (ADC0).................................................................................78

14.1.ADC0 Analog Multiplexer.............................................................................................79

14.2.ADC Operation.............................................................................................................80

14.2.1.Starting a Conversion ..........................................................................................80

14.2.2.Tracking Modes...................................................................................................80

14.2.3.Burst Mode ..........................................................................................................81

14.2.4.Settling Time Requirements ................................................................................82

14.2.5.Gain Setting.........................................................................................................83

14.3.8-Bit Mode....................................................................................................................83

14.4.12-Bit Mode..................................................................................................................83

14.5.Power Considerations..................................................................................................84

14.6.Output Code Formatting ..............................................................................................86

14.7.Programmable Window Detector .................................................................................87

14.7.1.Window Detector In Single-Ended Mode.............................................................87

14.8.Voltage and Ground Reference Options......................................................................89

14.8.1.External Voltage Reference.................................................................................89

14.8.2.Internal Voltage Reference.

.................................................................................89

14.8.3.Analog Ground Reference...................................................................................89

Part #	853-B
Description
Category	HARDWARE
Availability	In Stock
Qty	1

853-B

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