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RCV56HCF PCI/CardBus Modem Designer’s Guide
1129
ROCKWELL PROPRIETARY INFORMATION
3-15
Table 3-4. MDP Pin Signal Definitions
Label
I/O Type
Signal/Definition
OVERHEAD SIGNALS
XTLI
I
Crystal Int. Connect the BIF MODEMCLK pin through a 33
Ω
resistor.
XTLO
O
Crystal Out. Leave open.
VDD,
AVDD
PWR
Digital Power Supply. To +3.3V and digital circuits power supply filter.
AVAA
PWR
Analog Power Supply. To +3.3V and analog circuits power supply filter.
GND
GND
Digital Ground. Connect to digital ground.
AGND
GND
Analog Ground. Connect to analog ground.
SET3V#
IA
Set 3.3V Analog Reference. Connect to digital ground.
BIF TO MDP INTERFACE
RS0–RS4
IA
Address Lines 0-4. Connect to the BIF DA0–DA4 pins, respectively.
D0-D7
IA/OA
Data Line 0-7. Connect to the BIF DD0-DD7 pins, respectively.
READ#
IA
Read Enable. Connect to BIF DRD# pin.
WRITE#
IA
Write Enable. Connect to BIF DWR# pin.
RESET1#,
RESET2#
IA
External Device Active Low Reset. Connect to the BIF DRESET# pin.
WKRES#
OA
Wakeup Reset. Active low wake-up output. Connect to the BIF WKRES# pin.
CS#
IA
Chip Select. CS# output low selects the MDP. Connect to the BIIF MODEM_CS# pin.
IRQ
OA
Interrupt Request. MODEM_IRQ is the active low interrupt request from the MDP. Connect to the BIF
MODEM_IRQ pin.
M_TXCLK
OA
Modem Transmit Clock. Connect to BIF M_TXCLK pin.
M_TX
IA
Modem Transmit Data. Connect to BIF M_TX pin.
M_RXCLK
OA
Modem Receive Clock. Connect to BIF M_RXCLK pin.
M_RX
OA
Modem Receive Data. Connect to BIF M_RX pin.
SI_FRAME
IA/OB
ISDN Frame. 8 kHz frame sync; rising edge starts frame. Connect to BIF SI_FRAME pin.
SI_CLK
IA/OB
ISDN Clock. 1.536 MHz clock. Connect to BIF SI_CLK pin.
SI_DD
OA
ISDN Data Downstream. Connect to BIF SI_DD pin.
SI_DU
IA
ISDN Data Upstream. Connect to BIF SI_DU pin.
MDP TO SIEMENS PSB2186 S/T INTERFACE
IOM_FRAME
IA/OB
ISDN Frame Synchronization Clock. 8 kHz frame sync; rising edge starts frame. The start of the B1
channel in time-slot 0 is marked. Connect to the ISDN device FSC pin.
IOM_CLK
IA/OB
ISDN Clock. 1.536 MHz clock. Connect to the ISDN device DCL pin.
IOM_DD
IA
ISDN Data Downstream. IOM data input synchronous to IOM_CLK. Connect to the ISDN device DOUT pin.
IOM_DU
OA
ISDN Data Upstream. IOM data output synchronous to IOM_CLK. Connect to the ISDN device DIN pin.
MDP TO SIEMENS PSB21910 U INTERFACE
IOM_FRAME
IA/OB
ISDN Frame Synchronization Clock. 8 kHz frame sync; rising edge starts frame. The start of the B1
channel in time-slot 0 is marked. Connect to the ISDN device FSC pin.
IOM_CLK
IA/OB
ISDN Clock. 1.536 MHz clock. Connect to the ISDN device DCL pin.
IOM_DD
IA
ISDN Data Downstream. IOM data input synchronous to IOM_CLK. Connect to the ISDN device DOUT pin.
IOM_DU
OA
ISDN Data Upstream. IOM data output synchronous to IOM_CLK. Connect to the ISDN device DIN pin.
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