Rainbow Electronics DS26503 User Manual
Page 18
DS26503 T1/E1/J1 BITS Element
18 of 123
NAME TYPE
FUNCTION
AD[4]/
RMODE0
I/O
Data Bus D[4] or Address/Data Bus AD[4]/Receive Framing Mode Select
Bit 0
A[4]: In nonmultiplexed bus operation (BIS[1:0] = 01), it serves as the data
bus D[4].
AD[4]: In multiplexed bus operation (BIS[1:0] = 00), it serves as the
multiplexed address/data bus AD[4].
RMODE0: In Hardware Mode (BIS[1:0] = 11), it selects the receive side
operating mode.
AD[3]/TSM I/O
Data Bus D[3] or Address/Data Bus AD[3]/TS Mode Select
A[3]: In nonmultiplexed bus operation (BIS[1:0] = 01), it serves as the data
bus D[3].
AD[3]: In multiplexed bus operation (BIS[1:0] = 00), it serves as the
multiplexed address/data bus AD[3].
TSM: In Hardware Mode (BIS[1:0] = 11), this pin selects the function of TS.
Please see the register descriptions for more detailed information.
AD[2]/RSM/
SCLK
I/O
Data Bus D[2] or Address/Data Bus AD[2]/RS Mode Select/Serial Port
Clock
A[2]: In nonmultiplexed bus operation (BIS[1:0] = 01), it serves as the data
bus D[2].
AD[2]: In multiplexed bus operation (BIS[1:0] = 00), it serves as the
multiplexed address/data bus AD[2].
RSM: In Hardware Mode (BIS[1:0] = 11), this pin selects the function of RS.
Please see the register descriptions for more detailed information.
SCLK: In Serial Port mode this is the serial clock input.
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: 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. Transmit Clock Source Select 1