ROHM BU9206 Datasheet
1
Multimedia ICs
PS / 2 Mouse Controller
BU9206
The BU9206 is a PS / 2 mouse communication controller for PCs. This processor shapes waveforms and counts signals from the mouse rotary encoder as the mouse is moved, to provide two-way communication between mouse and
PC system.
•
Applications
PC mouse
•
Features
1) For PS / 2 mouse.
2) Compatible with a wide range of input signals, because it automatically sets the input threshold levels
for the X and Y direction, corresponding to the output level of the rotary encoder inside the mouse.
3) CMOS process enables low current consumption.
•
Absolute maximum ratings (Ta = 25°C)
Parameter
V
DD
Pd
Topr
Tstg
– 0.3 ~ + 7.0
1000
∗
– 25 ~ + 75
– 55 ~ + 125
V
Symbol Limits Unit
mW
°C
°C
VIN – 0.3 ~ VDD + 0.3 V
VOUT – 0.3 ~ VDD + 0.3 V
∗
Reduced by 10 mW for each increase in Ta of 1°C over 25°C.
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
Input voltage
Output voltage
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Recommended operating conditions (Ta = 25°C)
Parameter
VDD 4.5 5.0 5.5 V VDD
VIH2 0.4∗VDD —VDD V SCLK, SDATA
VIL2 0 — 0.16∗VDD V SCLK, SDATA
VAUP 0.3∗VDD — 0.8∗VDD V XA, XB, YA, YB
VALP 0 — 0.48∗VAUP V XA, XB, YA, YB
SWR, SWL, TEST2B, TEST1B,
TEST0, RESETB
VIH1 0.8∗VDD —VDD V
SWR, SWL, TEST2B, TEST1B,
TEST0, RESETB
VIL1 0 — 0.2∗VDD V
Symbol Min. Typ. Max. Unit Application pin
Power supply voltage
H input voltage 1
H input voltage 2
L input voltage 1
L input voltage 2
XY input H voltage
XY input L voltage
2
Multimedia ICs BU9206
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Block diagram
1
2
3
4
5
6
7
8
SWR
SWL
XA
XB
YA
YB
SCLK
V
SS
VDD
SDATA
RESETB
OSC1
OSC2
TEST0
TEST1B
TEST2B
16
15
14
13
12
11
10
9
Peak det.
Accumlator
Comp.
Comp.
Peak det.
Accumlator
Comp.
Comp.
Regi.
SCLK gen.
I / O inhibit
Osc
Data decoder
Data shifter
for output
Data shifter
for input
Scaling and
turbo
Sample
timing
Data encoder
Clk gen.
Regi.
Latch
Latch
Noise
cancel
Noise
cancel
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