Prestigio CAVALIERE 141 Technical & Service Manual page 89

Prestigio Cavaliere 141
5. Pin Descriptions of Major Components
5.3 SiS961(MuTIOL® Media I/O South Bridge )
Keyboar d Contr ol Inter face
Name Pin Attr
KBDAT / I/OD Keyboar d Dada:
GPIO15 O/OD When the internal keyboard controller is enabled, this pin is
3.3V/5V -AUX used as the keyboard data signal.
KBCLK / I/OD Keyboar d Clock:
GPIO16 O/OD When the internal keyboard controller is enabled, this pin is
3.3V/5V -AUX used as the keyboard clock signal.
PMDAT / I/OD PS2 Mouse Data:
GPIO17 O/OD When the internal keyboard and PS2 mouse controllers are
3.3V/5V -AUX enabled, this pin is used as PS2 mouse data signal.
PMCLK / I/OD PS2 Mouse Clock:
GPIO18 O/OD When the internal keyboard and PS2 mouse controllers are
3.3V/5V -AUX enabled, this pin is used as the PS2 mouse clock signal.
MAC Inter face
Name Pin Attr
RXER I RX Packet Er r or
3.3V/5V -AUX This event is signaled after the last received descriptor in a
failed packet reception that has been updated with valid status.
MIICLK25M I PHY 25MHz Clock Input:
3.3V/5V -AUX This pin provides the 25MHz clock signal input to the built-in
oscillator.
MDC O Management Data Clock:
3.3V -AUX Clock signal with a maximum rate of 2.5MHz used to transfer
management data for the external physical unit on the
MIIMDIO pin.
TXD[0:3] I Receive Data:
3.3V/5V -AUX This is a group of 4 data signals aligned on nibble boundaries
which are driven synchronous to the RXCLK by the external
physical unit.
TXEN O Tr ansmit Data:
3.3V -AUX This is a group of 4 data signals which are driven synchronous
to the TXCLK for transmission to the external physical unit.
RXD[0:3] I Receive Data:
3.3V/5V -AUX This is a group of 4 data signals aligned on nibble boundaries
which are driven synchronous to the RXCLK by the external
physical unit.
Signal Descr iption
Signal Descr iption
MAC Inter face Continue
Name Pin Attr
TXEN O Tr ansmit Enable:
3.3V -AUX When set to a 1, and the transmit state machine is idle, then the
transmit state machine becomes active. This bit will read back
as a 1 whenever the transmit state machine is active. After initial
power-up, software must insure that the transmitter has
completely reset before setting this bit
MDIO I/O Management Data I/O:
3.3V/5V -AUX Bi-direction signal used to transfer management information for
the external physical unit. Requires external pull-up resistor.
RXDV I
3.3V/5V -AUX This indicates that the external physical unit is presenting
recovered and decoded nibbles on the RXD[3:0] and that
RXCLK is synchronous to the recovered data. This signal will
encompass the frame, starting with the Start-Of-Frame delimiter
and excluding the End-Of-Frame delimiter.
COL I Collision Detect:
3.3V/5V -AUX This signal is asserted high asynchronous by the external
physical unit upon detection of a collision on the medium. It'll
remain asserted as long as the collision condition persists.
CRS I Car r ier Sense:
3.3V/5V -AUX This signal is asserted high asynchronously by the physical unit
upon detection of a non-idle medium.
RXCLK I Receive Clock
3.3V/5V -AUX A continuous clock that is recovered from the incoming data.
During 100Mb/s operation RXCLK is 25MHz and during
10Mb/s this is 2.5MHz.
TXCLK I Tr ansmit Clock
3.3V/5V -AUX A continuous clock that is sourced by the physical unit. During
100Mb/s operation RXCLK is 25MHz and during 10Mb/s this
is 2.5MHz.
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Technical Service Manual
Signal Descr iption
Receive Data Valid.