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(7)
PAL0 to PAL15 (Port AL) ... Input/output
Port AL is an 16-bit input/output port in which input or output can be set in 1-bit units.
Besides functioning as a port, in control mode (external expansion mode), these operate as the
address bus (A0 to A15) when memory is expanded externally and segment signal output of LCD
controller/driver.
An operation mode of port or control mode can be selected for each bit and specified by the port AL
mode control register (PMCAL).
(a) Port mode
PAL0 to PAL15 can be set to input or output in 1-bit units using the port AL mode register (PMAL).
(b) Control mode
PAL0 to PAL15 can be used as A0 to A15 by using PMCAL.
(c) A0 to A15 (Address) ... Output
This pin outputs the lower 16-bit address of the 24-bit address in the address bus on an external
access.
(d) SEG8 - SEG 23 Segment Signal output of LCD controller/driver ... Output
These pins functions as segment signal output of LCD controller/driver.
40
Chapter 2 Pin Functions
Preliminary User's Manual U14913EE1V0UM00
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