Toshiba TLCS-90 Series Data Book page 312

TOSHIBA
P3CR
(FFC7H)
7
6
WAITC
5 4
3
RDE ODE
R/W
TXDC
2
I
I
I
R/W
1
TMP90C840
a
RXDC
1 __
>
Select P30 and P31 functions
*
I I
P31
I
P30
I
1---1--------------1--------------1
I
001 Input port
I
Input port
I
1---1--------------1--------------1
I
all
Input port
I
RxD pin
I
1---1--------------1--------------1
I
101 RxD pin
I
Input port
I
1---1-------------- --------------1
I
11
I
No
t
us e d
I
R/W
_ _ _ ) Select P32 and P33 functions
*
I I
P33
I
P32
I
1---1--------------1--------------1
I
001 Output port
I
Output port
I
1---1--------------1--------------1
I
all
Output port
I
RxD pin
I
1---1--------------1--------------1
I
101 RxD pin
I
Output port
I
1---1--------------1--------------1
1 111 TxD pin
I
RTS/SCLK pin
I
___ >
Select P33 CMOS/Open-drain output
*
1
a
I
CMOS output
I
1---1----------------------------1
I
1
I
Open-drain output 1
Fig. 3.8.(6) Port 3 Control Register
MPU90-114