PAN301A Datasheet, PDF (15/24 Pages) List of Unclassifed Manufacturers – CMOS HIGH PERFORMANCE OPTICAL MOUSE SENSOR

PixArt Imaging Inc.
PAN301A
CMOS Optical Mouse Sensor
edges of SCLK and read on every rising edge of SCLK. The micro-controller must go to a high Z state
after the last address data bit. The PAN301A will go to the high Z state after the last data bit.
SCLK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SDIO
DON'T
CARE
0
A6
A5
A4
A3
A2
A1 A0 ^Hi-z D7
D6
D5
D4
D3
D2
D1
D0 Hi-z
R/W bit of next address
SDIO driven by Micro-controller
SDIO driven by PAN301A
Note "A"
Note "A"
SCLK
SDIO
1. Micro-controller send address to PAN301A.
2. Micro-controller release and set SDIO to Hi-Z after the last address bit.
7
8
A1
A0
Hi-Z
t_HOLD
3us,min
Note "B"
9
D7
Note "B" ^{1. PAN301A send data to Micro-controller .}
2. PAN301A release and set SDIO to Hi-Z after the last data bit.
SCLK
16
SDIO
D0
1
Hi-Z
R/W bit of next address
SDIO driven by micro-controller
Figure 11. Read operation
6.2 Re-Synchronous Serial Interface
There are times when the SDIO line from the PAN301A should be in the Hi-Z state. If the microprocessor
has completed a write to the PAN301A, the SDIO line is Hi-Z, since the SDIO pin is still configured as
an input. However, if the last operation from the microprocessor was a read, the PAN301A will hold the
D0 state on SDIO until a rising edge of SCLK. To place the SDIO pin into the Hi-Z state, first raise the
PD line, and then toggle the SCLK line from high to low to high. The SDIO line will now be in the Hi-Z
state. The PAN301A and the micro-controller might get out of synchronization due to following condition.
PD
SCLK
SDIO
1us,min
Hi-Z
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
ADDRESS(R/W)
DATA
Figure 12. Forcing PAN301A SDIO line to the Hi-Z state
6.2.1 USB Suspend
Termination of a transmission by the micro-controller may sometimes be required (for example, due to a
USB suspend interrupt during a read operation). To accomplish this the micro-controller should raise PD.
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PixArt Imaging Inc.
E-mail: [e-mail]
V1.3, MAY. 2004