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CHAPTER 6 PORT FUNCTIONS
P00 INTP0 Input 1 (Fixed) None P50 to P57 A8 to A15 Output x
Note 2
TI00 Input 1 (Fixed) None P64 RD Output x
Note 2
P01 INTP1 Input 1 x P65 WR Output x
Note 2
TI01 Input 1 x P66 WAIT Input x
Note 2
P02 to P06
INTP2 to INTP6
Input 1 x P67 ASTB Output x
Note 2
P07
Note 1
XT1 Input 1 (Fixed) None P80 to P87 A0 to A7 Output x
Note 3
P10 to P17
Note 1
ANI0 to ANI7
Input 1 x P100 TI5 Input 1 x
P30 to P32 TO0 to TO2 Output 0 0 TO5 Output 0 0
P33, P34 TI1, TI2 Input 1 x P101 TI6 Input 1 x
P35 PCL Output 0 0 TO6 Output 0 0
P36 BUZ Output 0 0 P120 to P127
RTP0 to RTP7
Output 0 Desired
value
P40 to P47 AD0 to AD7
Input/Output
x
Note 2
P130,P131
Note 1
ANO0, ANO1
Output 1 x
Table 6-6. Port Mode Register and Output Latch Settings when Using Alternate Function
Alternate Function
Input/Output
Pin Name
Name
Alternate Function
PxxPMxx
Input/Output
Pin Name
Name
Notes 1. If these ports are read out when these pins are used in the alternative function mode, undefined
values are read.
2. When the P40 to P47 pins P50 to P57 pins, and P64 to P67 pins are used for alternate functions,
set the function with the memory extension mode register (MM).
3. When the P80 to P87 pins are used for alternate functions, set the function with the external bus
type selection register (EBTS).
Cautions 1. When not using external wait in the external memory extension mode, the P66 pin can be
used as an I/O port.
2. When port 2 and port 7 are used for serial interface, the I/O latch or output latch must be
set according to its function. For the setting methods, see Figure 17-4. Serial Operation
Mode Register 0 Format, Figure 18-4. Serial Operation Mode Register 0 Format, Figure 19-3.
Serial Operation Mode Register 1 Format, and Table 20-2. Operating Mode Setting for Serial
Interface Channel 2.
Remarks x : Don’t care
PMxx : Port mode register
Pxx : Port output latch
PxxPMxx