TMP92CF30
2009-06-12
92CF30-142
3.7.19 Port T (PT0 to PT7)
Ports T0 to T7 are 8-bit general-purpose I/O ports. Each bit can be set individually for
input or output. Resetting sets ports T0 to T7 to input port and output latch to “0”.
In addition to functioning as general-purpose I/O port, PT0 to PT7 can also function as
data bus for 32-bit memory connection (D24 to D31).
Above setting is used the control register PTCR and function register PTFC.
Setting the AM1 and AM0 pins as shown below and resetting the device initialize 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
Input port (PT0 ~ PT7)
Data bus (D24 ~ D31)
Don’t use this setting
Figure 3.7.52 Port T0 to T7
PTCR register
PTFC2 register
PT register
S
External write enable
D24 to D31
Port read data
D24 to D31
External read enable
PT0 to PT7
D24 to D31
selector
PTFC register
0
S
0
1
selector
selector
S
1
0
Summary of Contents for TLCS-900/H1 Series
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