SAH-C515 SIEMENS [Siemens Semiconductor Group], SAH-C515 Datasheet - Page 21
SAH-C515
Manufacturer Part Number
SAH-C515
Description
8-Bit CMOS Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.SAH-C515.pdf
(160 pages)
- Current page: 21 of 160
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Figure 2-2
Fetch Execute Sequence
Semiconductor Group
OSC
(XTAL1)
ALE
a) 1-Byte,
b) 2-Byte,
c) 1-Byte,
d) MOVX (1-Byte, 2-Cycle)
1-Cycle Instruction,
1-Cycle Instruction,
2-Cycle Instruction,
P1 P2
S1
S1
S1
S1
S1
Read
Opcode
Read
Opcode
Read
Opcode
Read
Opcode
(MOVX)
P1
S2
S2
S2
S2
S2
P2
P1
S3
S3
S3
S3
S3
P2
e.g. INC A
e.g. ADD A,
e.g. INC DPTR
P1
S4
S4
S4
S4
S4
P2
Read next
Opcode (Discard)
Read 2nd
Byte
P1
Read next
Opcode
(Discard)
Read next Opcode (Discard)
S5
S5
S5
S5
S5
ADDR
P2
Access External Memory
P1
2-5
S6
S6
S6
S6
S6
P2
# Data
P1
S1
S1
S1
P2
DATA
P1
No Fetch
No ALE
S2
S2
S2
P2
Read next Opcode again
P1
Read next Opcode again
S3
S3
S3
Read next
Opcode again
Read next
Opcode
P2
P1
Fundamental Structure
S4
S4
S4
P2
No Fetch
P1
S5
S5
S5
P2
P1
S6
S6
S6
P2
MCD03218
C515
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