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MC9S08SG8 Datasheet, PDF (70/310 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Chapter 5 Resets, Interrupts, and General System Control
5.7.5 System Device Identiï¬cation Register (SDIDH, SDIDL)
These high page read-only registers are included so host development systems can identify the HCS08
derivative and revision number. This allows the development software to recognize where speciï¬c memory
blocks, registers, and control bits are located in a target MCU.
7
6
5
4
3
2
1
0
R
1
ID11
ID10
ID9
ID8
W
Reset:
11
â
â
â
0
0
0
0
= Unimplemented or Reserved
1 - Bit 7 is a mask option tie off that is used internally to determine that the device is a MC9S08SG8.
Figure 5-6. System Device Identiï¬cation Register â High (SDIDH)
Table 5-7. SDIDH Register Field Descriptions
Field
Description
7
Bit 7 will read as a 1 for the MC9S08SG8 devices; writes have no effect.
6:4
Bits 6:4 are reserved. Reading these bits will result in an indeterminate value; writes have no effect.
Reserved
3:0
Part Identiï¬cation Number â Each derivative in the HCS08 Family has a unique identiï¬cation number. The
ID[11:8] MC9S08SG8 is hard coded to the value 0x014. See also ID bits in Table 5-8.
R
W
Reset:
Field
7:0
ID[7:0]
7
6
5
4
3
2
1
0
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
0
0
0
1
0
1
0
0
= Unimplemented or Reserved
Figure 5-7. System Device Identiï¬cation Register â Low (SDIDL)
Table 5-8. SDIDL Register Field Descriptions
Description
Part Identiï¬cation Number â Each derivative in the HCS08 Family has a unique identiï¬cation number. The
MC9S08SG8 is hard coded to the value 0x014. See also ID bits in Table 5-7.
MC9S08SG8 MCU Series Data Sheet, Rev. 0
70
PRELIMINARY
Freescale Semiconductor
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