HD404449 Datasheet, PDF (49/125 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Data control register (DCD0 to 2: $02C to $02E)
(DCR0 to C: $030 to $03C)
DCD0, DCD1
Bit
3
2
1
0
Initial value
0
0
0
0
Read/Write
W
W
W
W
Bit name
DCD03, DCD02, DCD01, DCD00,
DCD13 DCD12 DCD11 DCD10
DCD2
Bit
3
2
1
0
Initial value
0
0
0
0
Read/Write
W
W
W
W
Bit name
DCD23 DCD22 DCD21 DCD20
DCR0 to DCRC
Bit
3
2
1
0
Initial value
0
0
0
0
Read/Write
W
W
W
W
Bit name
DCR03– DCR02– DCR01– DCR00–
DCRC3 DCRC2 DCRC1 DCRC0
All Bits
0
1
CMOS Buffer On/Off Selection
Off (high-impedance)
On
Correspondence between ports and DCD/DCR bits
Register Name
Bit 3
Bit 2
DCD0
DCD1
DCD2
DCR0
DCR1
DCR2
DCR3
DCR4
DCR5
DCR6
DCR7
DCR8
DCR9
DCRA
DCRB
DCRC
D₃
D₇
D₁₁
R0₃
R1₃
R2₃
R3₃
R4₃
R5₃
R6₃
R7₃
R8₃
R9₃
RA₃
RB₃
RC₃
D₂
D₆
D₁₀
R0₂
R1₂
R2₂
R3₂
R4₂
R5₂
R6₂
R7₂
R8₂
R9₂
RA₂
RB₂
RC₂
Bit 1
D₁
D₅
D₉
R0₁
R1₁
R2₁
R3₁
R4₁
R5₁
R6₁
R7₁
R8₁
R9₁
RA₁
RB₁
RC₁
Bit 0
D₀
D₄
D₈
R0₀
R1₀
R2₀
R3₀
R4₀
R5₀
R6₀
R7₀
R8₀
R9₀
RA₀
RB₀
RC₀
Figure 29 Data Control Registers (DCD, DCR)
47