

PIO17A - control register of Parellel Port I/O Submodule of CTM6
(Configurable Timer Module)

Address $yff488 (in normal d160 y==f see MM bit in SIMLCR)

Lower byte - direction reg.
Normal value:
$F7 -> 	[0..2] and [4..7] output
	[3] input

Upper byte - data reg.
Normal value (idle phone, no backlight, no sound)
$02
0 - 1 select earpiece (see test card command 43x x=4) 
1 - 1 ???
2 - 1 select alert piezo (t.c.c. 43x x=2) 
    NB! [0]=1 and [1]=1  = > select car kit audio  
3 - input 0 ???
4 - 0 backlight off / 1 backlight on
5 - 0 -5V suply to LCD module 0 on / 1 off
6 - 0 not bonded to pins of MCU
7 - 0 not bonded to pins of MCU

