
89
7593L–AVR–09/12
AT90USB64/128
11.4
Register description for I/O-ports
11.4.1
PORTA – Port A Data Register
Table 11-19. Overriding signals for alternate functions in PF7..PF4.
Signal name
PF7/ADC7/TDI
PF6/ADC6/TDO
PF5/ADC5/TMS
PF4/ADC4/TCK
PUOE
JTAGEN
PUOV
1
0
1
DDOE
JTAGEN
DDOV
0
SHIFT_IR +
SHIFT_DR
00
PVOE
0
JTAGEN
0
PVOV
0
TDO
0
DIEOE
JTAGEN
DIEOV
0
DI
–
AIO
TDI/ADC7 INPUT
ADC6 INPUT
TMS/ADC5 INPUT
TCK/ADC4 INPUT
Table 11-20. Overriding signals for alternate functions in PF3..PF0.
Signal name
PF3/ADC3
PF2/ADC2
PF1/ADC1
PF0/ADC0
PUOE
0
PUOV
0
DDOE
0
DDOV
0
PVOE
0
PVOV
0
DIEOE
0
DIEOV
0
DI
–
AIO
ADC3 INPUT
ADC2 INPUT
ADC1 INPUT
ADC0 INPUT
Bit
7
65
43
2
1
0
PORTA7
PORTA6
PORTA5
PORTA4
PORTA3
PORTA2
PORTA1
PORTA0
PORTA
Read/write
R/W
Initial value
00
000
0