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  Microchip Technology Semiconductor Electronic Components Datasheet  

MEC1308 Datasheet

Keyboard and Embedded Controller

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MEC1308
Keyboard and Embedded Controller for Notebook PC
Features
• 3.3V Operation with 5V Tolerant Buffers on PS/2
pins
• ACPI 1.0/2.0 PC99/PC2001 Compliant
• LPC Interface with Clock Run Support
- Serial IRQ Interface Compatible with Serial-
ized IRQ Support for PCI Systems
- 15 Direct IRQs
- ACPI SCI Interface
- nSMI output and supporting PM registers
- Shadowed write only registers
• Internal 64K SRAM
- Loaded at VCC1 power from the HOST/8051
SPI Memory Interface
- Provides 64KB of 8051 program space
- 32k-Byte region shared with 8051data space
• HOST/8051 SPI Memory Interface
- 3-pin Full Duplex serial communication inter-
face.
- Two Chip Select Pins
- Fully 8051 Controlled
- Hardware Support for two SPI Flash Configu-
rations:
- Switched SPI Flash Configuration
- Parallel Shared SPI Flash Configuration
• Two Power Planes
- Low Standby Current in Sleep Mode
• ACPI Embedded Controller Interface
• Configuration Register Set Compatible with ISA
Plug-and-Play Standard (Version 1.0a)
• High-Performance Embedded 8051 Keyboard
and System Controller
- Provides System Power Management
- System Watch Dog Timer (WDT)
- 8042 Style Host Interface
- Supports Interrupt and Polling Access
- 1024 Boot /ROM
- 256 Bytes Data RAM
- On-Chip Memory-Mapped Control Registers
- Access to VCC0 Backed Registers
- Up to 18x8 Keyboard Scan Matrix
- Two 16-Bit Timer/Counters
- Integrated Full-Duplex Serial Port Interface
- Seventy-Three 8051 Interrupt Sources
2014 Microchip Technology Inc.
- Thirty-Two 8-Bit, Host/8051 Mailbox Regis-
ters
- Sixty-Four Maskable Hardware Wake-Up
Events
- Fast GATEA20
- Fast CPU_RESET
- Multiple Clock Sources and Operating Fre-
quencies
- IDLE and SLEEP Modes
• Accurate Fail-Safe Ring Oscillator
- Single Clock source for most 8051 and SIO
functions
- Provides 2% frequency accuracy
- Lock Bit provides status
• Integrated Standby Power Reset Generator
- VCC1_RST# output
• VCC0 Backed Resources
- 16 Byte VCC0 Backed Registers
- VCC0 Backed Status Register
- 32.768KHz-input clock
- <2μA Standby Current (typ)
• Two 8584-Style I2C/SMBus Controllers
- 8051 Controlled Logic Allows I2C/SMBus
Master or Slave Operation
- I2C/SMBus Controllers are Fully Operational
on Standby Power
- 2 Sets of Dedicated Pins per I2C/SMBus
Controller
• Four independent Hardware Driven PS/2 Ports
• 48 General Purpose I/O Pins
- Maskable Hardware Wake-Event Capable
- Programmable Open-Drain/Push-Pull Out-
puts
• 7 General-Purpose Outputs
• Four Programmable Pulse-Width Modulator Out-
puts
- Independent Clock Rates
- 6-Bit Duty Cycle Granularity
- Operational in both Full on and Standby
modes
• Consumer Infrared Receiver for Vista (CIRV)
- Consumer Infrared Remote Control Receiver
Interface
- Support of all common CIR formats in S0
power state, per Vista standard mechanism.
DS00001753A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MEC1308 Datasheet

Keyboard and Embedded Controller

No Preview Available !

MEC1308
- Hardware matching of Microsoft Remote
input frames, with PME Wake (S3/S4/S5
power states).
- Programmable High-Speed Synchronous
Communications Engine (SCE) with a 32-
Byte FIFO and Programmable Threshold
- LED Control for Activity Indication
• Dual Fan Tachometer Inputs
• Debug Port (UART)
- High-Speed 16550A-Compatible UART with
16-Byte Send/Receive FIFOs
- Programmable Baud Rate Generator
- Relocatable to 480 Different Base I/O
Addresses
- 15 IRQ Options
• BC-Link Interconnection Bus
- Combined High Speed/Low Speed Bus Mas-
ter Controller
• General Purpose Analog to Digital Converter (GP-
ADC)
- 10-bit conversion precision
- 10-bit conversion per channel is completed in
10.91us
- 4 ADC general purpose channels
- Channel 0 has a 5 volt tolerant input
- 10-bit Conversion with 3.22 mV resolution
- 0 to 3.3 VDC Conversion Range
- Channel 1, 2, & 3 has a 3.3 volt tolerant input
with a 10-bit, 3.22 mV resolution
- Optional continuous sampling at a program-
mable rate
- Integral Non-Linearity of ±0.5 LSB; Dynamic
Non-Linearity of ±0.5 LSB
Description
The MEC1308 is a 128-pin 3.3V LPC-based ACPI 2.0
and PC99/PC2001 compliant Notebook I/O Controller.
See Figure 1, "MEC1308 Block Diagram".
The MEC1308 incorporates a high-performance 8051-
based keyboard and system controller with internal 64k
byte RAM; a 1K byte Boot ROM, and 16-bytes battery
backed registers. The 64K RAM is loaded via HOST/
8051 SPI Memory Interface. The HOST/8051 SPI
Memory Interface can be configured in Switched SPI
Flash Configuration or Parallel Shared SPI Flash Con-
figuration.
The MEC1308 has four PS/2 ports; an 16C550A-com-
patible 2 pin UART for Debug Port; a Consumer Infra-
red Receiver for Vista (CIRV), two 8584-style I2C/
SMBus controllers with two selectable ports per con-
troller; a Serial IRQ peripheral agent interface; an ACPI
Embedded Controller Interface; forty-eight General
Purpose I/O pins and seven General Purpose Outputs;
four independently programmable pulse width modula-
tors; dual fan control through the implementation of two
fan tachometer input pins; hardware monitoring of a
PWM input and maskable hardware wake-up events;
one BC-Link Combined High Speed/Low Speed Bus
Master Controller; 4 channel Analog to Digital Con-
verter.
The MEC1308 has two separate power planes to pro-
vide “instant on” and system power management func-
tions. Additionally, the MEC1308 incorporates
sophisticated power control circuitry (PCC). The PCC
supports multiple low power down modes. Wake-up
events and ACPI-related functions are supported
through the SCI Interface.
The MEC1308 supports the ISA Plug-and-Play Stan-
dard (Version 1.0a) and provides all the functionality for
current Windows O/S’s. The I/O Address and Hard-
ware IRQ of each logical device in the MEC1308 may
be reprogrammed through the internal configuration
registers. There are 480 I/O address location options
and 15 IRQs for each logical device.
DS00001753A-page 2
2014 Microchip Technology Inc.


Part Number MEC1308
Description Keyboard and Embedded Controller
Maker Microchip
Total Page 11 Pages
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