BU92747GUW Datasheet, PDF (2/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

2/4
˔Electrical Characteristics (DC Characteristics)
Ta=25°C, V_DD=1.8V, V_IO1=1.8V, V_IO2=1.8V and GND=0V unless otherwise stated
Item
Symbol
Standard value
Unit
MIN
TYP
MAX
Dissipation current 1
I_DD1
-
0.1
10
µA
Dissipation current 2
I_DD2
-
10
30
mA
Digital high-level input voltage
V_IH
0.75 × V_IO
-
-
V
Digital low-level input voltage
V_IL
-
-
0.25 × V_IO
V
-
Digital high-level input current
I_IH
-
-
10
µA
-
100
µA
Digital low-level input current
I_IL
-
-
10
µA
Digital high-level output voltage
V_OH
V_IO-0.6
-
-
V
Digital low-level output voltage
V_OL
-
-
0.6
V
Remarks
For input with no output load = 0V
For XIN = 48MHz
Input voltage level 1.8V
Input voltage level 1.8V
TEST1-3
Input voltage level GND
INTR, D_0-15, IrDAPWDOWN,
IrTX, IrRC, NIRQ, CTLA
IOH=-1mA
INTR, D_0-15, IrDAPWDOWN,
IrTX, IrRC, SDA, NIRQ, CTLA
IOL=1mA
˔Pin Description
Pin name I / O
IrRX
I
EXTIR
I
IrTX
O
D_0-15
A_0-3
CS
RD
WR
INTR
RESET
I/O
I
I
I
I
O
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
V_DD
-
V_IO1
-
V_IO2
-
GND
-
Condition
of after
reset
-
-
L
Input
-
-
-
-
H
-
-
L
L
-
Input
H
-
-
-
H
-
-
-
-
Pin Function
IrDA Receive Input Pin
Signal Input Pin in SM2="H" (Input Signal is outputted to IrTX or IrRC)
IrDA and remote control Transmission Output Pin
Transmission IrDA when RC_EN= "L"
Transmission remote control when RC_EN="H", RC_MODE="H"
Data I/O Pin
Address Input Pin
Chip Select Pin. Low (L) Active
The read/write signal goes “Active” in a Low period.
Read Signal Input Pin. Low (L) Active
Write Signal Input Pin. Low (L) Active
CPU Interrupt Request Output Pin (IrDA controller)
The signal goes “Low” when an interrupt condition takes place.
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
Serial clock
Serial data I/O Pin
CPU Interrupt Request Output Pin (Ir remote control)
The signal goes “Low” when an interrupt condition takes place.
Crystal IN / External CLK Input
Crystal OUT (N.C when external input clock is used)
Test pins (These pins must be GND during normal operation.)
IrDA module control signal output pin
These pins must be OPEN for IrDA modules having no power-down pin.
Power supply pin
Interface power supply voltage1
Interface power supply voltage2
Ground pin
Circuit
Diagram
B
B
A
C
B
B
B
B
A
B
B
A
A
F
G
A
E
E
D
A
-
-
-
-
REV. A