H8   Family — On-chip Peripherals: Special Functions
?
12
■ LCD Controller
Vcc
? Option for
usin g on-chip
or external
power supply
LCD Controller Diagram:
H8/38099
LCD drive
power supply
(On-chip 3-V
constant-voltage
power supply circuit)
C1
C2
V1
V2
V3
? Built-in
LC D RAM
(up to 128 bits)
with byte or
word access
? Supports multiple
duty cycles: static,
1/2, 1/3, or 1/4
φ /2 to φ /256
φ w
LCD trimming regi s ter
BGR control regi s ter
LCD port control regi s ter
LCD control regi s ter
LCD control regi s ter 2
Common
data latch
Common
driver
V ss
COM1
COM4
SEG40
SEG39
SEG38
SEG37
SEG36
40-bit
s hift
Segment
driver
Di s play timing generator
regi s ter
■ Event Lin k Controller (ELC)
? ELC unit mana g es real-time interrupts to
LCD RAM
20 byte s
2
SEGn
(n = 1 to 40)
3
ADC
SEG1
tri gg er multiple peripherals in sequence
? All peripherals includin g D TC ( D ata Transfer
Controller) can be activated throu g h ELC
H8S
CPU
1
Event
Link
Controller
4
5
Timer 1
Timer 2
6
Interrupt
Controller
? Frees up C P U to handle additional operations
? Eliminates code required for interrupt servicin g
7
Peripheral x
CPU Active
CPU Free
Event Link Controller Diagram
■ Peripheral I/O Mapping Controller (PMC)
? D i g ital pins can be
confi g ured to a
maximum of 7
External Interrupt
Timer function
different functions
Port 2
Port 3
External
Port 2
Port 3
(ex: Serial, Timer,
Interrupt, I/O, etc.)
? One board desi g n
can accommodate
multiple product
Serial
I/F
H8S/Tiny
Timer
Interrupt
H8S/Tiny
Serial
I/F
variations
Analog
Pins
Port 8
Port 7
function
Analog
Pins
Port 8
Port 7
? Optimizes pin
compatibility
Fixed
System
Pins
Fixed
System
Pins
between different
MCU devices
? Reduces board revisions
if layout errors occur
PMC Diagram
相关PDF资料
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