I-40
EPSON
S1C88348/317/316/308 TECHNICAL HARDWARE
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Table 5.1.1(l) I/O Memory map (00FF70H–00FF75H)
Address Bit
Name
00FF70 D7
D6
D5
D4
D3
D2
D1
D0
HZR51
HZR50
HZR4H
HZR4L
HZR1H
HZR1L
HZR0H
HZR0L
SR R/W
Function
Comment
R51 high impedance control
R50 high impedance control
R/W register
R14–R17 high impedance control
R10–R13 high impedance control
R04–R07 high impedance control
R00–R03 high impedance control
*1
Reserved register
10
0
R/W
High
impedance
1
High
impedance
Comple-
mentary
0
Comple-
mentary
00FF71 D7
D6
D5
D4
D3
D2
D1
D0
HZR27
HZR26
HZR25
HZR24
HZR23
HZR22
HZR21
HZR20
R27 high impedance control
R26 high impedance control
R25 high impedance control
R24 high impedance control
R23 high impedance control
R22 high impedance control
R21 high impedance control
R20 high impedance control
0R/W
High
impedance
Comple-
mentary
00FF72 D7
D6
D5
D4
D3
D2
D1
D0
HZR37
HZR36
HZR35
HZR34
HZR33
HZR32
HZR31
HZR30
R37 high impedance control
R36 high impedance control
R35 high impedance control
R34 high impedance control
R33 high impedance control
R32 high impedance control
R31 high impedance control
R30 high impedance control
These are just
R/W registers
on S1C88308
0R/W
High
impedance
Comple-
mentary
00FF74 D7
D6
D5
D4
D3
D2
D1
D0
R17D
R16D
R15D
R14D
R13D
R12D
R11D
R10D
R17 output port data
R16 output port data
R15 output port data
R14 output port data
R13 output port data
R12 output port data
R11 output port data
R10 output port data
1R/W
High
Low
00FF75 D7
D6
D5
D4
D3
D2
D1
D0
R27D
R26D
R25D
R24D
R23D
R22D
R21D
R20D
R27 output port data
R26 output port data
R25 output port data
R24 output port data
R23 output port data
R22 output port data
R21 output port data
R20 output port data
1R/W
High
Low
00FF73 D7
D6
D5
D4
D3
D2
D1
D0
R07D
R06D
R05D
R04D
R03D
R02D
R01D
R00D
R07 output port data
R06 output port data
R05 output port data
R04 output port data
R03 output port data
R02 output port data
R01 output port data
R00 output port data
1R/W
High
Low
*1 This is just R/W register on S1C88308.