Datasheet

Section 1 Overview
Rev. 3.00 Sep. 28, 2009 Page 5 of 910
REJ09B0350-0300
Classification
Module/
Function
Description
Timer 8-bit timer
(TMR)
• 8 bits × four channels (also works as 16 bits × two channels)
• Selectable from seven clocks: six internal clocks and one
external clock
• Pulse output or PWM output with an arbitrary duty cycle
Watchdog timer Watchdog
timer
(WDT)
• 8 bits × two channels (selectable from eight counter input
clocks)
• Switchable between watchdog timer mode and interval timer
mode
Serial
communic-
ation
interface
with FIFO
(SCIF)
• One channel (asynchronous mode)
• 16-stage FIFO buffers for transmission and reception
• Full-duplex communication capability
• On-chip baud rate generator allows any bit rate to be selected
• Direct control from the LPC host
Serial interface
• Two channels (choice of asynchronous or clocked synchronous
serial communication mode)
• Full-duplex communication capability
• Selection of the desired bit rate and LSB-first or MSB-first
transfer
Smart card/
SIM
Serial
communi-
cation
interface
(SCI)
• The SCI module supports a smart card (SIM) interface.
I
2
C bus
interface
(IIC)
• Three channels (two channels are switchable between input pin
and output pin)
• Two types of communication formats
• I
2
C bus format: addressing format with an acknowledge bit, for
master/slave operation
• Clocked synchronous serial format: non-addressing format
without an acknowledge bit, for master operation only
High-
performance
communication
Keyboard
buffer
control unit
(PS2)
• Four channels
• Conforms to PS/2 interface specifications
• Direct bus drive
• Interrupt and error detection
LPC
interface
(LPC)
• Four channels
• Serial transfer of cycle type, address, and data in
synchronization with the PCI clock
• Supports LPC interface I/O read and I/O write cycles
• Supports the shutdown function (LPCPD) of the LPC interface