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(8)
PAH0 to PAH7 (Port AH) ... Input/output
Port AH is an 8-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 (A16 to A23) for 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 AH
mode control register (PMCAH).
(a) Port mode
PAH0 to PAH7 can be set to input or output in 1-bit units using the port AH mode register (PMAH).
(b) Control mode
PAH0 to PAH7 can be used as A16 to A23 by using PMCAH.
(c) A16 to A23 (Address) ... Output
This pin outputs the upper 8-bit address of the 24-bit address in the address bus on an external
access.
(d) SEG0 - SEG7 Segment Signal output of LCD controller/driver ... Output
These pins functions as segment signal output of LCD controller/driver.
Chapter 2 Pin Functions
Preliminary User's Manual U14913EE1V0UM00
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