CDP1805 Intersil Corporation, CDP1805 Datasheet - Page 24

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

STATE
S1
S1
S0
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
INITIALIZE, NOT PROGRAMMER AC-
TABLE 2. CONDITIONS ON DATA BUS AND MEMORY ADDRESS LINES DURING ALL MACHINE STATES
0
0
1
2
3
4
5
6
6
6
6
6
6
6
6
6
6
6
6
6
I
CESSIBLE
RESET
FETCH
1-F
0-F
0-F
0-F
0-F
0-F
N
A
B
C
D
0
0
1
2
3
4
5
6
7
9
MNEMONIC
BRANCH
SHORT
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
INP 2
INP 1
INP 3
INP 4
INP 5
DEC
LDN
STR
INC
LDA
IDL
IRX
CDP1805AC, CDP1806AC
0
PRESCALER, CIL;
1
X, P
0
MRP
STOP AT TPB
WAIT FOR DMA OR INT
MRN
RN + 1
RN - 1
TAKEN: MRP
NOT TAKEN: RP + 1
MRN
D
RX + 1
MRX
MRX
MRX
MRX
MRX
MRX
MRX
BUS
BUS
BUS
BUS
BUS
Q, I, N, COUNTER,
CIE, XIE
X, P; 1
MRN
T THEN
MRX, D
MRX, D
MRX, D
MRX, D
MRX, D
I, N; RP + 1
BUS; RX + 1
BUS; RX + 1
BUS; RX + 1
BUS; RX + 1
BUS; RX + 1
BUS; RX + 1
BUS; RX + 1
D
D; RN + 1
OPERATION
RN
RX
RN
MIE, 0000
24
RP.0
RN
RP
RP
RX
RX
RX
RX
RX
RX
RX
R0
(Note 20)
DEVICE
DEVICE
DEVICE
DEVICE
DEVICE
HIGH Z
HIGH Z
HIGH Z
FROM
FROM
FROM
FROM
FROM
DATA
DATA
DATA
DATA
DATA
DATA
MRP
MRN
MRP
MRN
MRX
MRX
MRX
MRX
MRX
MRX
MRX
MRX
BUS
I/O
I/O
I/O
I/O
I/O
00
00
D
ADDRESS
MEMORY
UNDE-
UNDE-
FINED
FINED
RO
RN
RN
RN
RN
RN
RP
RP
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
MRD
1
1
0
1
0
1
1
0
0
1
1
0
0
0
0
0
0
0
1
1
1
1
1
MWR
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
0
0
0
0
0
LINES
N
0
0
0
0
0
0
0
0
0
0
0
1
2
3
4
5
6
7
1
2
3
4
5