Renesas H8S/2111B Bedienungsanleitung PDF herunterladen (Seite 13)

Peripherals

H8 Peripherals

■ Low-Pin-Count (LPC) Interface

• A popular interface to communicate to PC chip set

used in notebooks and PC servers

• Performs serial data and address transfer using

33MHz clock

• Supports I/O read and write cycles

• Supports serial interrupt on single line

• Supports power-down mode

• Reduced pin count

■ Host Interface X-Bus Interface

• Enables connection to the ISA (X-BUS)

• Four channel parallel interface

• Five host interrupt requests

■ Keyboard Buffer Controller (KBC)

• Conforms to PS/2 specification

• Error detection, parity error and stop bit monitoring

• Five host interrupt requests

■ PC Break Controller (PBC)

• Simplifies program debugging

• Instruction and data compare

■ Dual-Tone Multi-Frequency

(DTMF) Generator

• Generates DTMF frequency sine waveform,

with minimum distortion

• Synthesis or single waveform

■ On-chip Bus Controller (BSC)

• Provides glueless interface with external devices

• Supports basic SRAM, burst-ROM interface

• Manages external, addressable 16MB region

(8 different areas)

• Bus specification can be set independently

for each region

• Selectable 8- or 16-bit bus width

• Choice of 0 to 7 programmable wait-state access

• Supports direct connection to SDRAM

on selected devices

• Includes a bus arbiter for bus mastership arbitration

• Burst ROM interface can be set for area 0

• External write cycle and internal access can be

executed in parallel

• Idle-cycle insertion capability

Output control

Mask control

Output control

Match signal

PC break

interrupt

Match signal

Mask control

BARA

BCRA

BARB BCRB

Comparator

Control logic

Comparator

Internal address

Access

status

Control logic

PC Break Controller Block Diagram

control

Output

control

Row

Column

TONED

LSI

Pxx

DTMF

ref

HA16808ANT

MUTE

2SC458

2 k

24 kΩ

100 kΩ

360 kΩ

+0.47 μF

Note: The numeric values on the right end of the signal lines indicate the HA16808ANT pin numbers.

TONED Pin Output Equivalent Circuit

DTMF Application Usage

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 45 46

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