Datasheet

Resets, Interrupts, and System Configuration
MC9S08GT16A/GT8A Data Sheet, Rev. 1
Freescale Semiconductor 75
5.7.5 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 ID11 ID10 ID9 ID8
W
Reset 00000000
= Unimplemented or Reserved
Table 5-6. SDIDH Field Descriptions
Field Description
3:0
ID[11:8]
Part Identification Number — Each derivative in the HCS08 Family has a unique identification number. The
MC9S08GT16A/GT8A is hard coded to the value 0x00D. See also ID bits in Table 5-7.
76543210
R ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0
W
Reset 00001101
= Unimplemented or Reserved
Figure 5-7. System Device Identification Register Low (SDIDL)
Table 5-7. SDIDL Field Descriptions
Field Description
7:0
ID[7:0]
Part Identification Number — Each derivative in the HCS08 Family has a unique identification number. The
MC9S08GT16A/GT8A is hard coded to the value 0x00D. See also ID bits in Table 5-6.