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.
Figure 6.1 Power Supply Control Block Diagram
[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.”
H8/3048F-ONE
SH7727
ST16C2550CQ48
( U A R T )
/ C T S A
/ R T S A
RXA
TXA
EXTAL
P82(/IRQ2)
P27
T X D 0
R X D 0
CK
RV5C348A(RTC)
ADS7843E (Touch panel)
/ I R Q 1
P50
/INT
C E
S I
SO
C L K
LCD
DIN
D O U T
D C L K
/PENIRQ
/CS
LCD board
/IRQ0(P80)
P51
Cursor
switch
• i
S W 1
• j
Push-button
switch (SW2,3)
P22
P21
P20
P14
P13
P12
P11
P10
P A 4
Power-on switch
NMI switch
Reset switch
/IRQ3(P83)
PA2
P A 1
P30
• `
P37
P66
8
8-bit LED
Power supply (battery monitoring)
V O U T 2
V O U T 1
A D P _ I N
VOLT
A M P
SIGN
H8_SW2
H8_SW1
P17
P16
PA6
A N 0
A N 1
PA5
P25
P24
BUS
P62
PINT11
P61
NMI
P44
P45
P46
LTC1555LEGN
M 0
M 1
M2
e T R O N
socket
P60
Reset
circuit
/RESET
P40
P41
P42
P43
1.8V ON/OFF
(Vcc)
-SH7727 C P U c o r e
- SH7290 CPU core
3.3V ON/OFF
(VCC3A)
-SH7727
-SDRAM(SH7727)
-FLASH(SH7727)
3.3V ON/OFF
(VCC3B)
-UART
-PCMCIA
- U S B H U B
-Sound generatorIC
-SIM card
Reset signal for
devices other
thanH8/3048F
5V ON/OFF
(5V)
-USB power supply
-Sound generator
amplifier
-ATA card power
supply
H8 reset
circuit
/RESET
PB6
29391AFJA(EEPROM)
CS
D0
D1
/SK
P52
P53
TXD1
RXD1
SCK1
TIOCA3(PB0)
TIOCA4(PB2)
TIOCB2(PA7)
/IRQ4(P94)
LCD board
L E
D
Infrared remote control
Transmission
Receiving unit
/CS
SCLK
D I N
MAX5413ECD
(electronic volume)
D I P S W 5 - 8
48