CDP1805 Intersil Corporation, CDP1805 Datasheet - Page 28

• Manufacturer Part Number: CDP1805
• Description: CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer
• Manufacturer: Intersil Corporation

NOTE:
20. Data bus floats for first 2-1/2 clocks of the nine clock initialization cycle; all zeros for remainder of cycle.
STATE
S1#1
S1#1
S1#1
S1#1
S1#1
S1#1
S1#1
S1#1
S1#1
#2
#2
#3
#4
#5
#6
#7
#8
#2
#3
#4
#5
#6
#2
#3
#2
#2
#3
#2
#2
#2
#2
TABLE 2. CONDITIONS ON DATA BUS AND MEMORY ADDRESS LINES DURING ALL MACHINE STATES (Continued)
A
A
A
B
B
C
C
C
7
8
8
8
8
8
8
8
8
9
9
9
9
9
9
F
F
F
F
F
F
F
F
I
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
0-F
N
C
C
F
4
4
7
7
F
F
MNEMONIC
DADD
DADD
SRET
SRET
SRET
SRET
SRET
SRET
RSXD
RSXD
RSXD
SCAL
SCAL
SCAL
SCAL
SCAL
SCAL
SCAL
SCAL
DSMI
DSBI
DADI
DADI
DSMI
RLDI
RLDI
RLDI
DSM
DSM
RNX
RNX
CDP1805AC, CDP1806AC
DECIMAL ADJUST
RN.0, RN.1
T
B
RP.0, RP.1
B, T
MRN
B
B, T
RN.0, RN.1
RX + 1
B, T
MRX
B
B, T
RN.0, RN.1
T
B
RN.0, RN.1
B, T
MRP
B
B, T
RP + 1
MRX + D
DECIMAL ADJUST
D - MRX
DECIMAL ADJUST
MRP + D
RP + 1
DECIMAL ADJUST
D - MRP
RP + 1
DECIMAL ADJUST
MRX RX - 1
MRX; RX - 1
MRX RX - 1
T; MRN
T; MRX
MRX; RX - 1
T; MRP
RN.1, RN.0
RP.0, RP.1
RP.1, RP.0
RN.0, RN.1
RX.1, RX.0
RN.0, RN.1;`
B; RX + 1
B; RP + 1
B; RN + 1
OPERATION
RX
RP
RP
RP
DF, D
DF, D
DF; D
DF, D;
T, B
T, B
T, B
T, B
T, B
B
B; RP + 1
B; RN + 1
28
RX
RX
RX
RX
RX
RP
RN
DF, D
DF, D
DF, D
DF, D
DF, D
RN
RP
M(RP + 1)
M(RX + 1)
M(RP + 1)
M(RX + 1
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
HIGH Z
DATA
RN.0
RN.1
MRP
RN.0
RN.1
MRP
MRX
MRX
MRP
MRP
BUS
ADDRESS
MEMORY
RP + 1
RP + 1
RX + 1
RX + 2
RP + 1
RP + 1
RP + 1
RX - 1
RX - 1
RN
RX
RP
RN
RP
RP
RN
RX
RP
RN
RN
RN
RX
RX
RP
RP
RP
RN
RX
RP
RX
RP
MRD
1
1
1
1
1
1
0
0
1
1
0
0
1
1
1
1
0
0
1
0
1
0
1
0
1
0
1
1
1
1
1
MWR
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
LINES
N
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0