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6. Power Supply Controller
6.1 Power Supply Controller Functions
The H8/3048F-ONE power supply controller (simply called the power supply controller) provides the following
control functions by firmware stored in the internal memory. The following functions can be controlled through
the UART ChA from the SH7760. Figure 6.1 shows a power supply control block diagram.
(1) RTC (real-time clock) function
(2) System power supply (3.3V/5/0V) ON/OFF control function
(3) Touch panel coordinate position read function
(4) Key switch input function
(5) Infrared remote control transmission/reception function
(6) Electronic volume
(7) Serial EPROM read/write function
These functions can be controlled through the UART chA from SH7760.
1.8V ON/OFF
(Vcc)
-SH7727 C P U c o r e
- SH7290 CPU core
3.3V ON/OFF
(VCC3A)
-SH7727
-FLASH(SH7727)
-SDRAM(SH7727)
Infrared remote control
LCD board
Receiving unit
[Notes]
Though the power supply controller's I/O port is connected to the /RTSA and /CTSA pins of the UART controller
(ST16C2550) through the circuit, the power supply controller does not execute hardware control during
communications with SH7760. For details of communications between SH7760 and the power supply controller, refer
to 6.2 "Serial Communications between SH7760 and the Power Supply Controller."
3.3V ON/OFF
(VCC3B)
-UART
5V ON/OFF
-PCMCIA
(5V)
- U S B H U B
-USB power supply
-Sound generatorIC
-SIM card
-Sound generator
amplifier
-ATA card power
supply
H8 reset
circuit
Reset signal for
SH7727
devices other
thanH8/3048F
Reset
/RESET
circuit
NMI
PINT11
BUS
/ C T S A
/ R T S A
RXA
TXA
EXTAL
ST16C2550CQ48
(UART)
L E
D
Transmission
Figure 6.1 Power Supply Control Block Diagram
H8/3048F-ONE
P40
/ I R Q 1
P50
P41
P52
P42
P53
TXD1
RXD1
SCK1
P43
/RESET
PB6
/IRQ0(P80)
P51
P A 4
P22
P21
P20
P60
P14
P61
P13
P12
P62
P11
P10
P17
P16
PA6
A N 0
A N 1
PA5
P25
P82(/IRQ2)
P27
P24
T X D 0
P44
R X D 0
P45
CK
P46
/IRQ3(P83)
TIOCA3(PB0)
PA2
TIOCA4(PB2)
P A 1
TIOCB2(PA7)
P30• ` P37
/IRQ4(P94)
P66
48
MAX5413ECD
RV5C348A(RTC)
(electronic volume)
/INT
C E
S I
SO
C L K
LCD board
ADS7843E (Touch panel)
DIN
D O U T
D C L K
/PENIRQ
/CS
Cursor
switch• i S W 1• j
Push-button
switch (SW2,3)
LTC1555LEGN
M 0
M 1
M2
Power-on switch
NMI switch
Reset switch
8
8-bit LED
DIPSW5-8
/CS
SCLK
D I N
29391AFJA(EEPROM)
CS
D0
D1
/SK
LCD
V O U T 2
V O U T 1
ADP_IN
VOLT
A M P
SIGN
H8_SW2
H8_SW1
Power supply (battery monitoring)
eTRON
socket
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