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  Microchip Technology Semiconductor Electronic Components Datasheet  

MEC1725 Datasheet

Keyboard and Embedded Controller

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MEC1725
Keyboard and Embedded Controller for Notebook PC
Operating Conditions
• Operating Voltages: 3.3 V and 1.8 V
• Operating Temperature Range: -40 oC to 85 oC
Low Power Modes
• Chip is designed to always operate in Lowest
Power state during Normal Operation
• Supports all 5 ACPI Power States for PC plat-
forms
• Supports 2 Chip-level Sleep Modes: Light Sleep
and Heavy Sleep
- Low Standby Current in Sleep Modes
ARM® Cortex-M4F Embedded Processor
• Programmable clock frequency up to 48 MHz
• Fixed point processor
• Single 4GByte Addressing Space
• Nested Vectored Interrupt Controller (NVIC)
- Maskable Interrupt Controller
- Maskable hardware wake up events
- 8 Levels of priority, individually assignable by
vector
• EC Interrupt Aggregator expands number of Inter-
rupt sources supported or reduces number of vec-
tors needed
• Complete ARM® Standard debug support
- JTAG-Based DAP port, comprised of SWJ-
DP and AHB-AP debugger access functions
Memory Components
- 416KB Code/Data SRAM
- 352KB optimized for code performance
- 64KB optimized for data performance
- 128 Bytes Battery Powered Storage SRAM
- 4K bits OTP
- In circuit programmable
- ROM
- Contains Boot ROM
- Contains Runtime APIs for built-in func-
tions
- 128KB of ROM space
Clocks
• 96 MHz Internal PLL
• 32 kHz Clock Sources
- Internal 32 kHz silicon oscillator
- External single-ended 32 kHz clock
source
Package Options
- 176 pin WFBGA
Security Features
• Boot ROM Secure Boot Loader
- Hardware Root of Trust (RoT) using Secure
Boot and Immutable code
- Supports 2 Code Images in external SPI
Flash (Primary and Fall back image)
- Authenticates SPI Flash image before load-
ing
- Support AES-256 Encrypted SPI Flash
images
• Hardware Accelerators:
- Multi purpose AES Crypto Engine:
- Support for 128-bit - 256-bit key length
- Supports Battery Authentication applica-
tions
- Digital Signature Algorithm Support
- Support for ECDSA and EC_KCDSA
- Cryptographic Hash Engine
- Support for SHA-1, SHA-256 to SHA-512
- Public Key Crypto Engine
- Hardware support for RSA and Elliptic
Curve asymmetric public key algorithms
- RSA keys length of 1024 to 4096 bits
- ECC Prime Field keys up to 571 bits
- ECC Binary Field keys up to 571 bits
- Microcoded support for standard public
key algorithms
- OTP for storing Keys and IDs
- Lockable on 32 B boundaries to prevent
read access or write access
- True Random Number Generator
- 1 Kbit FIFO
- JTAG Disabled by default
System Host interface
• Enhanced Serial Peripheral Interface (eSPI)
- Intel eSPI Specification compliant
- eSPI Interface Base Spec, Intel Doc.
#327432-004, Rev. 1.0.
- eSPI Compatibility Spec, Intel Doc.
#562633, Rev. 0.6
2020-2021 Microchip Technology Inc.
DS00003584E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MEC1725 Datasheet

Keyboard and Embedded Controller

No Preview Available !

MEC1725
- Support for Master Attached Flash Sharing
(MAFS)
- Support for Slave Attached Flash Sharing
(SAFS)
- Supports all four channels:
- Peripheral Channel
- Virtual Wires Channel
- Out-of-Band (OOB) Tunneled Message
Channel
- Run-time Flash Access Channel
- Supports EC Bus Master to Host Memory
- Supports up to 66 MHz maximum operating
frequency
• One Serial Peripheral Interface (SPI) Slave
- Quad SPI (half-duplex) or Single wire (full
duplex) support
- Mode 0 and Mode3 operation
- Programmable wait time for response delay
• System to EC Message Interface
- Three Embedded Memory Interfaces
- Provides Two Windows to On-Chip SRAM
for Host Access
- Two Register Mailbox Command Interface
- Mailbox Registers Interface
- Thirty-two 8-bit registers
- Two Register Mailbox Command Inter-
faces
- Two Register SMI Source Interfaces
- Six ACPI Embedded Controller Interfaces
- Five EC Interfaces
- One Power Management Interface
• One Serial Peripheral Interface (SPI) Master Con-
troller
- Dual and Quad I/O Support
- Flexible Clock Rates
- Support for 1.8V and 3.3V slave devices
- SPI Burst Capable
- SPI Controller Operates with Internal DMA
Controller with CRC Generation
- Mappable to the following ports (only 1 port
active at a time)
- 1 shared SPI Interface
- 1 Private SPI Interface
• Two General purpose Serial Peripheral Interface
(SPI) Controllers
- One EC driven Full Duplex Serial Communi-
cation Interface
- Flexible Clock Rates
- SPI burst capable
• PECI Interface 3.1
- Support Intel’s low voltage PECI
• Port 80 BIOS Debug Port
DS00003584E-page 2
- Two Ports, Assignable to Any eSPI IO
Address
- 24-bit Timestamp with Adjustable Timebase
- 16-Entry FIFO
Peripheral Features
• Internal DMA Controller
- Hardware or Firmware Flow Control
- Firmware Initiated Memory-to-Memory trans-
fers
- Hardware CRC-32 Generator on Channel 0
• I2C/SMBus Controllers
- 5 I2C/SMBus controllers
- 15 Configurable I2C ports
- Full Crossbar switch allows any port to be
connected to any controller
- Supports Promiscuous mode of operation
- Fully Operational on Standby Power
- Multi-Master Capable
- Supports Clock Stretching
- Programmable Bus Speeds
- 1 MHz Capable
- Supports DMA Network Layer
• General Purpose I/O Pins
- Inputs
- Asynchronous rising and falling edge
wakeup detection Interrupt High or Low
Level
- Outputs:
- Push Pull or Open Drain output
- Programmable power well emulation
- Pull up or pull down resistor control
- Automatically disabling pull-up resistors
when output driven low
- Automatically disabling pull-down resis-
tors when output driven high
- Programmable drive strength
- Two separate1.8V/3.3V configurable IO
regions
- Group or individual control of GPIO data
- 13- Over voltage tolerant GPIO pins
- Glitch protection and Under-Voltage Protec-
tion on all GPIO pins
- 8 GPIO Pass through ports
• Input Capture and Compare timer
- Six 32-bit Capture Registers
- 16 Input Pins (ICTx)
- Full Crossbar switch allows any port to be
connected to any controller
- 32-bit Free-running timer
- Two 32-bit Compare Registers
- Capture, Compare and Overflow Interrupts
2020-2021 Microchip Technology Inc.


Part Number MEC1725
Description Keyboard and Embedded Controller
Maker Microchip
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MEC1725 Datasheet PDF






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