SDA55XX Datasheet, PDF (21/230 Pages) Infineon Technologies AG – Preliminary & Confidential

SDA 55xx
Preliminary & Confidential
Package and Pinning
6\PERO
5'
)XQFWLRQ
Type Additional reference
O
Available:
MQFP100,
PLCC84
Control output; indicates a read access to the internal XRAM;
can be used for latching data from the data bus into an external
data RAM by a MOVX instruction.
This signal is also available as P4.2.
:5
Type Additional reference
O
Available:
MQFP100,
PLCC84
$/(
36(1
;520
)/B[[
Control output; indicates a write access to the internal XRAM;
can be used as a write strobe for writing data into an external
data RAM by a MOVX instruction.
This signal is also available as P4.3
Type Additional reference
O
Available:
MQFP100
Address Latch Enable
Type Additional reference
O
Available:
MQFP100,
PLCC84
Program Store Enable
is a control output signal which is usually connected to OE input
line of the external program memory to enable the data output.
Type
I
Additional Reference
Available:
MQFP100,
PLCC84
This pin must be pulled low to access external ROM.
Type
I
Additional Reference
Available:
MQFP100
All the pins prefix by FL_ are test pins which must be left open..
Semiconductor Group
21
User’s Manual July 99