2 CPU
2-6
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
In the exception handler routine, the
retd
instruction should be executed at the end of processing to return to the
suspended instruction. When returning from the exception by the
retd
instruction, the processor restores the saved
data in order of the R0 and the PC.
Neither hardware interrupts nor NMI interrupts are accepted during a debug exception.
Chip ID
2.5
The S1C33L26 has chip ID bits shown below that allow the application software to identify CPU type, model, and
chip version.
Core ID Bits (D[7:0]/0x20008)
These bits provide an 8-bit ID code that indicates the chip core type.
ID
Chip Core Type
0x02
C33 standard macro core (C33 STD Core)
0x03
C33 mini-macro core
0x04
C33 advanced macro core (C33 ADV Core)
0x05
C33 PE Core
0x06
C33 PE little endian core
The S1C33L26 has adopted the C33 PE little endian core, so the chip core ID is 0x06.
Product Series ID Bits (D[7:0]/0x20009)
These bits provide an 8-bit ID code that indicates the product series of the S1C33 Family.
ID
Product Series
0x03
S1C333xx Series
0x04
S1C334xx Series
0x0E
S1C33Exx Series
0x15
S1C33Lxx Series
The product series ID of the S1C33L26 is 0x15.
Model ID Bits (D[7:0]/0x2000a)
These bits provide an 8-bit ID code that indicates the model.
The model ID of the S1C33L26 is 0x26.
Version Bits (D[7:0]/0x2000b)
These bits provide an 8-bit ID code that indicates the version number.
0x00 is a version number.