TMP92CF30
2009-06-12
92CF30-126
3.7.14 Port L (PL0 to PL7)
PL0 to PL7 are 8-bit output ports. Resetting sets the output latch PL to “0”, and PL0 to
PL7 pins output “0”. In addition to functioning as a general-purpose output port, port L can
also function as a data bus for 32-bit memory connection (D16 to D23). Above setting is
used the function register PLFC.
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 (PL0 ~ PL7)
Data bus (D16 ~ D23)
Don’t use this setting
Figure 3.7.36 Port L0 to L7
PLCR register
PLFC2 register
PL register
S
External write enable
D16 to D23
Port read data
D16 to D23
External read enable
PL0 to PL7
D16 to D23
Selector
PLFC register
0
S
0
1
Selector
Selector
S
1
0
Содержание TLCS-900/H1 Series
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