TMP91C824
91C824-64
(3) Port
72
(SI/SCL,/HRESET)
Port72 is a general-purpose I/O port. It is also used as SI (data input for SIO mode), SCL (clock
input/output for I
2
C mode) for serial bus interface and input for release hard-protect.
Open drain possible :
P7ODE<ODEP72>
SCL output
In
te
rn
a
l d
a
ta
b
u
s
Selector
A
B
S
Selector
A
B
S
P72 (SI/SCL)
P7 read
Direction
control
(on bit basis)
P7CR write
Function
control
(on bit basis)
P7FC write
S
Output latch
P7 write
Reset
SI input
SCL input
P-ch
Programable
Pull-up
Figure 3.5.11 Port 72