Zilog Z8PE002 - Manual (Page 35)

Z8PE002
ZiLOG Z8Plus OTP Microcontroller
DS008700-Z8X0799 P R E L I M I N A R Y 35
PORT A REGISTER DIAGRAMS
Figure 28. Port A Input Value Register
Figure 29. Port A Output Value Register
Figure 30. Port A Directional Control Register
Figure 31. Port A Special Function Register
D7 D6 D5 D4 D3 D2 D1 D0
Register 0D0H PTAIN
Port A Bit n current input value
(only updated for pins in input mode)
D7 D6 D5 D4 D3 D2 D1 D0
Register 0D1H PTAOUT
Port A Bit n currentoutput value
D7 D6 D5 D4 D3 D2 D1 D0
Register 0D2H PTADIR
1 = Bit n set as an output
0 = Bit n set as an input
D7 D6 D5 D4 D3 D2 D1 D0
Register 0D3H PTASFR
1 = Bit n in open-drain mode
0 = Bit n in push-pull mode