S4525A Peripherals & Enhanced FLASH 1 © 1999 Microchip Technology Incorporated. All Rights...

© 1999 Microchip Technology Incorporated. All Rights Reserved. S4525A Peripherals & Enhanced FLASH S4525A Peripherals & Enhanced FLASH 11

Peripherals & Enhanced FLASHPeripherals & Enhanced FLASH

New Peripherals New Peripherals

EnhancedEnhanced FLASHFLASHPIC16F87X and PIC16F62XPIC16F87X and PIC16F62X



PIC16F87X Features at a GlancePIC16F87X Features at a Glance 8K x 14 FLASH Program

Memory Typ. 1000 E/W Byte/Word Read/Write at VDD

256 x 8 EEPROM Data Memory

Min. 100K E/W 368 x 8 Data Memory (RAM) 33 I/O ports

25mA sink/source 3 Timers

1 - 16-bit 2 - 8-bit

10-bit A/D

Two Capture/Compare/PWMs USART

9-bit addressable High Speed

Enhanced SPI All 4 SPI modes supported Microwire Support

Master I2C

Hardware Write to I2C devices

In-Circuit-Serial Programming

In-Circuit-Debugger Parallel Slave Port



PIC16F62X Features at a GlancePIC16F62X Features at a Glance 18-pin package Up to 2K x 14 FLASH

Program MemoryTyp. 1000 E/WByte/Word Read/Write at

VDD

128 x 8 EEPROM Data Memory

Min. 100K E/W 224 x 8 Data Memory (RAM) 16 I/O ports

25mA sink/source

3 Timers 1 - 16-bit 2 - 8-bit

Capture/Compare/PWM USART

9-bit addressable High Speed

2 Comparators In-Circuit-Serial Programming

Internal RC Oscillator



Enhanced CCP ModuleEnhanced CCP Module Capture and Compare Modes:

The same as existing CCP Module.

New PWM Modes: Single output Dual outputs Quad outputs



Enhanced CCP ModuleEnhanced CCP Module Single Output Mode:

PA output running in PWM mode. Similar to existing CCP in PWM mode. Selectable active high or active low output.

Application examples: To create a low frequency D/A converter. To drive a single power switch.



Enhanced CCP ModuleEnhanced CCP Module Dual Output Mode:

PA output running in PWM Mode. PB output is complementary of PA. Dead-band control:

To accommodate turn-off delay of one switch before turning on the other.

Programmable 0-255 times 4xTosc. Independently selectable active high or active low

outputs.



Dead Time PWMDead Time PWM

TPTDC

TD

TD = Dead Time [Dual Output Mode Only]TDC = Duty Cycle TimeTP = Period Time



Enhanced CCP ModuleEnhanced CCP Module Application Examples for Dual Output Mode:

Half-bridge Full-bridge with all four switches modulated at PWM

frequency



PWM Dual Output Mode Half Bridge ExamplePWM Dual Output Mode Half Bridge Example

LOADFETDRIVER

PA

PB

PIC16C717PIC16C770PIC16C771



PWM Dual Output Mode Full Bridge ExamplePWM Dual Output Mode Full Bridge Example

PA

PB


VHIGH

FETDRIVER

FETDRIVER MOTOR


PA

PB

FETDRIVER



Enhanced CCP ModuleEnhanced CCP Module Quad Output Mode:

PB or PD output modulated. PC or PA output is active. Independently selectable active high or active low

output pairs.

Application Examples: Full-bridge where only one switch is modulated at

PWM frequency to minimize switching losses.



PWM Quad Output Mode ExamplePWM Quad Output Mode Example

FETDRIVER

PA

PB

PC

PD


MOTOR

VHIGH

FETDRIVER

A C

B D

S4525A Peripherals & Enhanced FLASH 1 © 1999 Microchip Technology Incorporated. All Rights...

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