XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
REV. 1.0.1
TABLE 5: MOTOROLA MODE: MICROPROCESSOR INTERFACE SIGNALS
M
OTOROLA
QUIVALENT
IN
XRT86L30
TYPE
DESCRIPTION
E
P
IN NAME
P
ALE
WR
TS
I
I
Transfer Start: This active high signal is used to latch the contents on the
address bus ADDR[11:0]. The contents of the address bus are latched into the
ADDR[11:0] inputs on the falling edge of TS.
R/W
Read/Write: This input pin from the local µP is used to inform the XRT86L30
whether a Read or Write operation has been requested. When this pin is
pulled “High”, WE will initiate a read operation. When this pin is pulled
“Low”, WE will initiate a write operation.
RD
WE
OE
I
Write Enable: This active low input functions as the read or write signal from the
local µP dependent on the state of R/W. When WE is pulled “Low” (If CS
is “Low”) the XRT86L30 begins the read or write operation.
No Pin
PCLK
RDY
I
I
Output Enable: This signal is not necessary for the XRT86L30 to interface to the
MPC8260 or MPC860 Power PCs.
CLKOUT
TA
Synchronous Processor Clock: This signal is used as the timing reference for
the Power PC synchronous mode.
O
Transfer Acknowledge: This active low signal is provided by the XRT86L30
device. It indicates that the current read or write cycle is complete, and the
XRT86L30 is waiting for the next command.
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EXAR [ EXAR CORPORATION ]
