TMP92CF30
2009-06-12
92CF30-99
3.7.5
Port 7 (P70 to P76)
Port7 is a 7-bit general-purpose I/O port (P70 is used for output only). Bits can be
individually set as either inputs or outputs by control register P7CR and function register
P7FC.
In addition to functioning as a general-purpose I/O port, P70 to P76 pins can also
function as interface-pins for external memory.
A reset initializes P70 pin to output port mode, and P71 to P76 pins to input port mode.
Setting the AM1 and AM0 pins as shown below and resetting the device initialize port 7
to the following function pins:
Initial setting of P70 pin
AM1
AM0
Function Setting after reset is released
0
0
1
1
0
1
0
1
Don’t use this setting
RD pin
RD pin
Don’t use this setting
Figure 3.7.9 Port7
P7 register
S
0
1
Selector
Port read data
P70 (
RD
)
RD
P7FC register
Selector
Selector
P7 register
S 1
0
Port read data
P7CR register
P7FC register
S
0
1
NDRE
,
NDWE
WRLL
,
WRLU
S
0
1
P71 (
WRLL
,
NDRE
)
P72 (
WRLU
,
NDWE
)
Selector
Summary of Contents for TLCS-900/H1 Series
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