h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 161

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

5.5.5
The H8S/2149 is capable of fast word access to on-chip memory, and high-speed processing can
be achieved by providing the program area in on-chip ROM and the stack area in on-chip RAM.
Table 5.8 shows interrupt response times—the interval between generation of an interrupt request
and execution of the first instruction in the interrupt handling routine. The symbols used in table
5.8 are explained in table 5.9.
Table 5.8
Notes: 1. Two states in case of internal interrupt.
Table 5.9
Legend:
m: Number of wait states in an external device access
No.
1
2
3
4
5
6
Total (using on-chip memory)
Instruction fetch
Branch address read
Stack manipulation
Item
Interrupt priority determination *
Number of wait states until executing
instruction ends *
PC, CCR stack save
Vector fetch
Instruction fetch *
Internal processing *
2. Refers to MULXS and DIVXS instructions.
3. Prefetch after interrupt acceptance and interrupt handling routine prefetch.
4. Internal processing after interrupt acceptance and internal processing after vector fetch.
Interrupt Response Times
Interrupt Response Times
Number of States in Interrupt Handling Routine Execution
2
3
Symbol
S
S
S
I
J
K
4
Internal
Memory
1
1
2-State
Access
4
Normal Mode
3
1 to (19+2·S
2·S
S
2·S
2
11 to 31
I
K
I
8-Bit Bus
Rev. 3.00 Jan 18, 2006 page 133 of 1044
3-State
Access
6+2m
I
)
Object of Access
External Device
Number of States
Section 5 Interrupt Controller
2-State
Access
2
Advanced Mode
3
1 to (19+2·S
2·S
2·S
2·S
2
12 to 32
K
I
I
REJ09B0280-0300
16-Bit Bus
3-State
Access
3+m
I
)