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Chapter 7 Analog-to-Digital Converter (ATD10B16CV4)
MC9S12HZ256 Data Sheet, Rev. 2.05
Freescale Semiconductor
227
7.3.2.8
Reserved Register 0 (ATDTEST0)
Read: Anytime, returns unpredictable values
Write: Anytime in special modes, unimplemented in normal modes
NOTE
Writing to this register when in special modes can alter functionality.
7.3.2.9
ATD Test Register 1 (ATDTEST1)
This register contains the SC bit used to enable special channel conversions.
Read: Anytime, returns unpredictable values for bit 7 and bit 6
Write: Anytime
NOTE
Writing to this register when in special modes can alter functionality.
76543210
R
uuuuuuuu
W
Reset
1
0
00000
= Unimplemented or Reserved
u = Unaffected
Figure 7-10. Reserved Register 0 (ATDTEST0)
76543210
R
uuuuuuu
SC
W
Reset
0
00000
= Unimplemented or Reserved
u = Unaffected
Figure 7-11. Reserved Register 1 (ATDTEST1)
Table 7-19. ATDTEST1 Field Descriptions
Field
Description
0
SC
Special Channel Conversion Bit — If this bit is set, then special channel conversion can be selected using
CC, CB, and CA of ATDCTL5.
Table 7-20 lists the coding.
0 Special channel conversions disabled
1 Special channel conversions enabled