BU92747XXX Datasheet, PDF (5/46 Pages) Rohm – IrDA Controller LSI built-in Ir remote control

BD92747XXX
Datasheet
Pin name I / O
WR
I
INTR
O
RESET
I
PWDN
I
IrRC
O
CTLA
O
SCL
I
SDA
I/O
NIRQ
O
XIN/CLK48M I
XOUT
O
TEST1-3
I
IrDA
PWDOWN
O
VDD
-
VIO1
-
VIO2
-
GND
-
Condition of
after reset
-
H
-
-
L
L
-
Input
H
-
-
-
H
-
-
-
-
Pin Function
Write Signal Input Pun. Low (L) Active
CPU Interrupt Request Output Pin. (IrDA Controller)
The signal goes “Low” when an interrupt condition takes
place.
(note) Read EIR register at once and do appropriate
processing when the interrupt request is occurred. When
processing to the interrupt request is delayed, it is not likely
to be able transmission/ reception it normally.
Reset Input Pin. Low (L) Active
The signal causes the internal register settings, etc. to be
initialized.
Power Down Mode Setting. Low (L) Active
When set to Low (L), this signal causes the wait status and
sets the low dissipation current mode.
After the power down mode is removed, RESET=L must
set to Low until crystal clock oscillation becomes stable
(about 2 or 3 ms). After that RESET must set to High.
Take it into consideration that this period depends on the
crystal in use.
Remote control transmission Output pin
Transmission remote control when RC_EN= "H",
RC_MODE= "L"
Control Signal Output Pin
Circuit
Diagram
B
A
B
B
A
A
Serial clock
F
Serial data I/O Pin
G
CPU Interrupt Request Output Pin (Ir remote control)
The signal goes “Low” when an interrupt condition takes
A
place.
Crystal IN / External CLK Input
E
Crystal OUT (N.C when external input clock is used)
E
Test pins (These pins must be GND during normal
operation.)
D
IrDA module control signal output pin
These pins must be OPEN for IrDA modules having no
A
power-down pin.
Power supply pin
-
Interface power supply voltage1
-
Interface power supply voltage2
-
Ground pin
-
●Equivalent Circuit Diagram
A
B
C
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TSZ22111・15・001
PWDN
XIN
XOUT
D
E
F
G
5/5
TSZ02201-0E4E0F100020-1-2
24. June. 2015 Rev.001