Datasheet

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SBAS253E − MAY 2003 − REVISED JULY 2006
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48
3.6.14 Reset Register (28
H
)
The Reset Register, in address 28
H
, can either reset the ADS7869 entirely, or simply reset the counters.
Writing an AA
H
pattern to the C
X
bits will reset both counter 1 and counter 2, and all registers related to the
counters. Writing an AA
H
pattern to the S
X
bits forces the ADS7869 into a reset state; both the digital and the
analog sections are reset. The Reset Register is a write-only register. If the Reset Register is read, the data
0000
H
will be received. The format of the input word is shown in Table 1−26. To reset the complete ADS7869,
the pattern AAAA
H
should be written to the Reset Register.
Once the Reset Register activates a system reset, the register must not be rewritten to in order to deactivate
the reset condition. Writing another pattern to the C
X
bits (other than AA
H
) deactivates a reset condition of the
counters or a reset condition of the device.
For more information about reset conditions, see the Reset section.
Table 1−26. Reset Register
W0
W0 W0 W0 W0 W0 W0 W0 W0 W0 W0 W0 W0 W0 W0 W0
S7 S6 S5 S4 S3 S2 S1 S0 C7 C6 C5 C4 C3 C2 C1 C0
bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Bit 15−8: S7−0: Reset control of entire ADS7869 (both digital and analog sections)
00000000 = No effect on ADS7869
...
10101001 = No effect on ADS7869
10101010 = Reset entire ADS7869
10101011 = No effect on ADS7869
...
11111111 = No effect on ADS7869
Bit 7−0: C7−0: Reset control of both counters and related registers of ADS7869
00000000 = No effect on ADS7869
...
10101001 = No effect on ADS7869
10101010 = Reset both counters in ADS7869
10101011 = No effect on ADS7869
...
11111111 = No effect on ADS7869