Chapter 8 Analog-to-Digital Converter (ATD10B8CV3)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 365
8.3.2.8 Reserved Register (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.
8.3.2.9 ATD Test Register 1 (ATDTEST1)
This register contains the SC bit used to enable special channel conversions.
Read: Anytime, returns unpredictable values for Bit7 and Bit6
Write: Anytime
Module Base + 0x0008
76543210
RUUUUUUUU
W
Reset 10000000
= Unimplemented or Reserved
Figure 8-10. Reserved Register (ATDTEST0)
Module Base + 0x0009
76543210
RUU00000
SC
W
Reset 00000000
= Unimplemented or Reserved
Figure 8-11. ATD Test Register 1 (ATDTEST1)
Table 8-18. 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 8-19 lists the coding.
0 Special channel conversions disabled
1 Special channel conversions enabled
Note: Always write remaining bits of ATDTEST1 (Bit7 to Bit1) zero when writing SC bit. Not doing so might result
in unpredictable ATD behavior.