h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 185

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

5.5.5
The H8S/2138 Group and H8S/2134 Group are 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
4
Symbol
S
S
S
I
J
K
1
Internal Memory
1
Normal Mode
3
1 to (19+2·S
2·S
S
2·S
2
11 to 31
I
K
I
Rev. 4.00 Jun 06, 2006 page 131 of 1004
Object of Access
2-State Access
4
I
)
Number of States
Section 5 Interrupt Controller
External Device
Advanced Mode
3
1 to 19+(2·S
2·S
2·S
2·S
2
12 to 32
8-Bit Bus
K
I
I
REJ09B0301-0400
3-State Access
6+2m
I
)