pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 3

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

Revision 1.2
Features
Host Controlled Functions Features
Two 16-bit Multi Function Timer (MFT16) modules.
Each module:
— Contains two 16-bit timers
— Supports Pulse Width Modulation (PWM), Capture
Pulse Width Modulation (PWM) Module
— Eight outputs
— 8/16-bit duty cycle resolution
— 8/16-bit common input clock prescaler
Timer and Watchdog (TWM)
— 16-bit periodic interrupt timer with 30 s resolution
— 8-bit watchdog timer
Analog to Digital Converter (ADC)
— 14 channels (up to ten external and four internal),
— Sigma-delta technology for high noise rejection
— Three voltage measurements every 100 ms
— Internal voltage reference
System Health Monitoring
— Controlled by embedded controller
— System Voltage Measurement
Digital to Analog Converter (DAC)
— Four channels, 8-bit resolution
— 1 s conversion time for 50 pF load
— Full output range from AGND to AVCC
Analog Comparators Monitor (ACM)
— Eight comparator inputs on KBD scan inputs
— 6-bit input measurement resolution
— Scan and Threshold modes
— Supports low-current system wake-up
Development Support Features
— Interface to debugger via JTAG pins
CR16B Access to Host Controlled Functions
— Enabled when host inactive
Supports Microsoft
(APM) Specifications Revision 1.2, February 1996
— Generates the System Management Interrupt (SMI)
PC01 and ACPI Compliant
— PnP Configuration Register structure
— Flexible resource allocation for all logical devices
and Counter
and 5-bit prescaler for system tick and periodic
wake-up tasks
with 8-bit resolution
Up to ten external measurement points
Four internal measurement points
Smart power failure detection
ISE/ADB mode
On-board Debug mode
Relocatable base address
(Continued)
®
Advanced Power Management
3
Clocking, Supply and Package Information
Real-Time Clock (RTC)
— DS1287 and MC146818 compatible
— 242-byte battery backed-up CMOS RAM
— Calendar including century and automatic leap-year
— Optional adjustment for daylight saving time
— BCD or binary format for timekeeping
— Three individually maskable interrupt event flags:
— Double-buffer time registers
— Alarm wake-up
Mobile System Wake-Up Control (MSWC)
— Wake-up on detection of RI1, RI2, RING activity
— Optional routing of power-up request on IRQ and/or
Strap Inputs for operation control
— ENV1-0 for IRE/OBD/DEV operating mode selection
— SHBM for shared BIOS control
— TRI-STATE for ISE/ADB support
Clocks
— Single 32.768 KHz crystal oscillator
— LPC clock, up to 33 MHz
— On-chip high frequency clock generator
— 32.768 KHz clock out
— CR16B clock out
Testability
— XOR tree structure
— TRI-STATE device pins, selected at power-up by
adjustment (Y2K compliant)
periodic rates from 122 s to 500 ms; time-of-day
alarm, once-per-second to once-per-day
SMI lines
strap input (TRIS)
15 IRQ routing options
External modem ring on serial port
Ring pulse or pulse train on RING input signal
Software-controlled off events
CPU clock 4-20 MHz
Software-controlled frequency generation
Multiplier source is the 32.768 KHz input
Includes all device pins (except supply, analog
and crystal oscillator pins)
Selected at power-up by strap input
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