Rainbow Electronics DS26504 - Manual (Page 18)

DS26504 T1/E1/J1/64KCC BITS Element
18 of 128
NAME TYPE FUNCTION
AD[1]/
RMODE3/
MOSI
I/O
Data Bus D[1] or Address/Data Bus AD[1]/Receive Mode Select 3/Master
Out-Slave In
A[1]: In nonmultiplexed bus operation (BIS[1:0] = 01), it serves as the data bus
D[1].
AD[1]: In multiplexed bus operation (BIS[1:0] = 00), it serves as the
multiplexed address/data bus AD[1].
RMODE3: In Hardware Mode (BIS[1:0] = 11), this pin selects the receive side
operating mode.
MOSI: Serial data input called Master Out-Slave In for clarity of data transfer
direction.
AD[0]/
TCSS0/
MISO
I/O
Data Bus D[0] or Address/Data Bus AD[0]/Transmit Clock Source
Select 0/Master In-Slave Out
A[0]: In nonmultiplexed bus operation (BIS[1:0] = 01), it serves as the data bus
D[0].
AD[0]: In multiplexed bus operation (BIS[1:0] = 00), it serves as the
multiplexed address/data bus AD[0].
TCSS0: Transmit Clock Source Select 0.
MISO (output): In serial bus mode (BIS[1:0] = 10), this pin serves as the serial
data output Master In-Slave Out.
TCSS1 I Transmit Clock Source Select 1
A6/
MPS0
I
Address Bus Bit A[6]/MCLK Prescale Select 0
A6: In nonmultiplexed bus operation (BIS[1:0] = 01), this pin serves as A[6]. In
multiplexed bus operation (BIS[1:0] = 00), these pins are not used and should
be tied low.
MPS0: In Hardware Mode (BIS[1:0] = 11), MCLK prescale select is used to set
the prescale value for the PLL.
A5/CPOL/
TMODE0 I
Address Bus Bit A[5]/Serial Port Clock Polarity Select/Transmit Mode
Select 0
A5: In nonmultiplexed bus operation (BIS[1:0] = 01), this pin serves as A[5]. In
multiplexed bus operation (BIS[1:0] = 00), these pins are not used and should
be tied low.
CPOL: In Serial Port Mode (BIS[1:0] = 10), this pin selects the serial port clock
polarity. See the functional timing diagrams for the Serial Port Interface.
TMODE0: In Hardware Mode (BIS[1:0] = 11), this pin is used to configure the
transmit operating mode.