Details Of Control Registers - Epson S1C88655 Technical Manual

9 OUTPUT PORTS

9.4 Details of Control Registers

Table 9.4.1 shows the output port control bits.
Address Bit Name
00FF70 D7 HZR07
R07 high impedance control
D6 HZR06 R06 high impedance control
D5 HZR05
R05 high impedance control
D4 HZR04 R04 high impedance control
D3 HZR03
R03 high impedance control
D2 HZR02 R02 high impedance control
D1 HZR01
R01 high impedance control
D0 HZR00 R00 high impedance control
00FF71 D7 HZR17
R17 high impedance control
D6 HZR16 R16 high impedance control
D5 HZR15
R15 high impedance control
D4 HZR14 R14 high impedance control
D3 HZR13
R13 high impedance control
D2 HZR12 R12 high impedance control
D1 HZR11
R11 high impedance control
D0 HZR10 R10 high impedance control
00FF72 D7 –
–
D6 – –
D5 HZR25
R25 high impedance control
D4 HZR24 R24 high impedance control
D3 HZR23
R23 high impedance control
D2 HZR22
R22 high impedance control
D1 HZR21
R21 high impedance control
D0 HZR20
R20 high impedance control
00FF73 D7 –
–
D6 –
–
D5 –
–
D4 –
–
D3 HZR33
R33 high impedance control
D2 HZR32
R32 high impedance control
D1 HZR31
R31 high impedance control
D0 HZR30
R30 high impedance control
00FF74 D7 R07D
R07 output port data
D6 R06D
R06 output port data
D5 R05D
R05 output port data
D4 R04D
R04 output port data
D3 R03D R03 output port data
D2 R02D
R02 output port data
D1 R01D R01 output port data
D0 R00D
R00 output port data
00FF75 D7 R17D R17 output port data
D6 R16D
R16 output port data
D5 R15D R15 output port data
D4 R14D
R14 output port data
D3 R13D R13 output port data
D2 R12D
R12 output port data
D1 R11D R11 output port data
D0 R10D
R10 output port data
62
Table 9.4.1(a) Output port control bits
Function
EPSON
1 0 SR R/W
High Comple-
0
impedance mentary
High Comple-
0
impedance mentary
0
– –
0
– –
High Comple-
0
impedance mentary
0
– –
0
– –
0
– –
0
– –
High Comple-
0
impedance mentary
1
High Low
1
High Low
S1C88655 TECHNICAL MANUAL
Comment
R/W
R/W
R
Constantly "0" when
R
being read
R/W
R
Constantly "0" when
R
being read
R
R
R/W
R/W
R/W