H8S2556 Datasheet, PDF (156/982 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family/H8S/2500 Series

Section 5 Interrupt Controller
Table 5.8 Number of States in Interrupt Handling Routine Execution Status
Object of Access
External Device*
8-Bit Bus
16-Bit Bus
Symbol
On-Chip 2-State
Memory Access
3-State
Access
2-State
Access
3-State
Access
Instruction fetch
S_I
1
4
6 + 2m
2
Branch address read
S
J
Stack manipulation
S
K
Legend:
m: Number of wait states in an external device access.
Note: * Not available in this LSI.
3+m
5.5.6 DTC Activation by Interrupt
The DTC can be activated by an interrupt. In this case, the following selections can be made.
1. Interrupt request to CPU
2. Activation request to DTC
3. Multiple selection of 1 and 2 above.
For details on interrupt request, which enables DTC activation, see section 8, Data Transfer
Controller (DTC). Figure 5.8 shows a block diagram of DTC and interrupt controller.
Rev.5.00 Sep. 27, 2007 Page 110 of 932
REJ09B0099-0500