Datasheet

Chapter 5 Resets, Interrupts, and System Configuration
MC9S08GB60A Data Sheet, Rev. 2
Freescale Semiconductor 77
5.8.5 System Device Identification Register (SDIDH, SDIDL)
This read-only register is included so host development systems can identify the HCS08 derivative and
revision number. This allows the development software to recognize where specific memory blocks,
registers, and control bits are located in a target MCU.
Figure 5-6. System Device Identification Register High (SDIDH)
76543210
R REV3 REV2 REV1 REV0 ID11 ID10 ID9 ID8
W
Reset 0
1
1
The revision number that is hard coded into these bits reflects the current silicon revision level.
0
(1)
0
(1)
0
(1)
0000
= Unimplemented or Reserved
Table 5-6. SDIDH Field Descriptions
Field Description
7:4
REV[3:0]
Revision Number — The high-order 4 bits of address 0x1806 are hard coded to reflect the current mask set
revision number (0–F).
3:0
ID[11:8]
Part Identification Number — Each derivative in the HCS08 Family has a unique identification number. The
MC9S08GBxxA/GTxxA is hard coded to the value 0x002. See also ID bits in Tabl e 5 -7 .
76543210
R ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0
W
Reset00000010
= Unimplemented or Reserved
Figure 5-7. System Device Identification Register Low (SDIDL)
Table 5-7. SDIDL Field Descriptions
Field Description
3:0
ID[7:0]
Part Identification Number — Each derivative in the HCS08 Family has a unique identification number. The
MC9S08GBxxA/GTxxA is hard coded to the value 0x002. See also ID bits in Tabl e 5 -6 .