TMP92CZ26A

92CZ26A-117

3.7.1 Port 1 (P10 to P17)

Port1 is an 8-bit general-purpose I/O port. Bits c an be ind ividually set as either inputs or
outputs by control register P1CR and functi on register P1FC.
In addition to functioning as a gen eral-purpose I/O port, port1 can als o function as a data
bus (D8 to D15).
Setting the AM1 and AM0 pins as shown below and resetting the devi ce ini tiali ze port 1
to the following function pins:
AM1 AM0 Function Setting after reset is released
0
0
1
1
0
1
0
1
Don’t use this setting
Data bus (D8 to D15)
Don’t use this setting
Input port (P10 to P17)
Figure 3.7.1 Port1
P1CR Register
P1FC Register
P1 Register
S
0
1
Selector
S 1
0
Selector
External write enable
D8 to D15
Port read data
D8 to D15
External read enable
P10 to P17
(D8 to D15)