Datasheet
Peripherals
H8 Peripherals
11
■ 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
AV
CC
AV
SS
TONED
TONED
AV
CC
LSI
Pxx
DTMF
V
ref
1
HA16808ANT
MUTE
2SC458
19
2 k
Ω
24 kΩ
100 kΩ
360 kΩ
+0.47 μF
20
11
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