Port 6 (P60 - P63) - Toshiba TLCS-90 Series Data Book

TOSHIBA TMP90C840
3.5.7 Port 6 (P60 - P63)
Port 6 is a 4-bit general-purpose I/O port (P6: memory address FFCCH)
whose function is specified by the control register (P67CR: bits 0 - 3
of memory address FFCEH) for each bit. The control register is
initialized to "0" by resetting, and Port 6 enters in the input mode.
This port is also serviceable as a stepping motor control port channel
o
(MOO - M03) , so either the general-purpose I/O or the stepping motor
contrbl port can be selected by the control register (SMMOD: bits 0
and 1 of memory address FFCBH). This port is served as the general-
purpose I/O port by resetting.
Reset
r-- •
r-____________
~------
__
--~~IDirectionl
LControl
,r----------T----~
writ! P67CR
~
______
~I
FunctionL-
I
Control , -
Write tMMOD
H
~
rt
CD
Shift... •
r-----------~----------~I
output
Ir---~----~--~~'
~
Latch
I
>--...---i
g
SA6
PI
I--'
1 - - - - - 4
1 Shift Alternate
L
~
l
Register
r----
lJ
t_
~ ~-----------------.
C
Ul
Write P6
L,..-,-.
- - - - - +
-
~\..._-J-
.... - - - - .
Read p6
Fig. 3.5 (12) Port 6
MPU90-66
Output
Buffer
Port 6
(P60-p63
/MOO-M03)