Datasheet

Section 1 Overview
Rev. 4.00 Sep 27, 2006 page 4 of 1130
REJ09B0327-0400
Item Specifications
14-bit PWM timer
(PWMX)
• Up to 2 outputs
• Resolution: 1/16384
• 312.5 kHz maximum carrier frequency (20-MHz operation)
Serial communication
interface
(SCI: 2 channels,
SCI0 and SCI1)
• Asynchronous mode or synchronous mode selectable
• Multiprocessor communication function
SCI with IrDA:
1 channel (SCI2)
• Asynchronous mode or synchronous mode selectable
• Multiprocessor communication function
• Compatible with IrDA specification version 1.0
• TxD and RxD encoding/decoding in IrDA format
Keyboard buffer
controller (PS2:
3 channels)
(H8S/2148 Group,
H8S/2147N)
• Compatible with PS/2 interface
• Direct manipulation of transmission output by software
• Receive data input to 8-bit shift register
• Data receive completed interrupt, parity error detection, stop bit
monitoring
Host interface (HIF)
(H8S/2148 Group,
H8S/2147N)
• 8-bit host interface (ISA) port
• Five host interrupt requests (HIRQ11, HIRQ1, HIRQ12, HIRQ3,
HIRQ4)
• Normal and fast A20 gate output
• Four register sets (each comprising two data registers and two status
registers)
Keyboard controller
• Matrix keyboard control using keyboard scan with wakeup interrupt and
sense port configuration
A/D converter
• Resolution: 10 bits
• Input:
 8 channels (dedicated analog pins)
 16 channels (same pins as keyboard sense port)
• High-speed conversion: 6.7 µs minimum conversion time (20-MHz
operation)
• Single or scan mode selectable
• Sample-and-hold function
• A/D conversion can be activated by external trigger or timer trigger