EKM6211 Ver la hoja de datos (PDF) - ELAN Microelectronics

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EKM6211

RF Mouse Rx Controller

ELAN Microelectronics 

eKM6211

RF Mouse Rx Controller

Contention occurs when the system lowers CLK to inhibit eKM6211 output after

eKM6211 has started a transmission. If this occurs before the rising edge of the tenth

clock, eKM6211 internal store its data in its buffer and returns DATA and CLK to an

active level. If the contention does not occur by the tenth clock, the transmission is

complete. Following a transmission, the system inhibits eKM6211 by holding CLK low

until it can service the input or until the system receives a request to send a response

from eKM6211.

Data Input (from system to eKM6211):

The System first checks if eKM6211 is transmitting data. If eKM6211 is transmitting,

the system can override the output forcing CLK to an inactive level prior to the tenth

clock. If eKM6211 transmission is beyond the tenth clock, the system receives the

data. If eKM6211 is not transmitting or if the system choose to override the output, the

system force CLK to an inactive level for a period of not less than 100u sec while

preparing for output. When the system is ready to output start bit (0), it allows CLK go

to active level. If request-to-send is detected, eKM6211 clocks 11 bits. Following the

tenth clock, eKM6211 checks for an active level on the DATA line, and if found, force

DATA low, and clock once more. If occurs framing error, eKM6211 continue to clock

until DATA is high, then clocks the line control bit and request a Resend.

When the system sends out a command or data transmission that requires a response,

the system waits for eKM6211 to response before sending its next output.

6.1.4 PS/2 Mouse Error Handling

A Resend command (FE) following receipt of an invalid input or any input with

incorrect polarity.

If two invalid inputs are received in succession, an error code of hex (FC) is send to

the system.

The counter accumulators are cleared after receiving any command except

"Resend".

eKM6211 receives a Resend command (FE), it transmits its last packet of data.

In the stream mode "Resend" is received by eKM6211 following a 3-byte data

packet transmission to the system. eKM6211 resend the 3-byte data packet prior

to clearing the counter.

A response is sent within 25 ms if

The system requires a response

An error is detected in the transmission

If eKM6211 is in the stream mode:

Product Specification (V1.0) 11.15.2003

•5

(This specification is subject to change without further notice)

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