MC68HC912BD32 Datasheet, PDF (232/292 Pages) Freescale Semiconductor, Inc – Advance Information

Freescale Semiconductor, Inc.
Analog to Digital Converter
The test registers control various special modes which are used
during manufacturing. The test register can be read or written only in
the special modes. In the normal modes, reads of the test register
return zero and writes have no effect.
SAR[9:0] — SAR Data
Reads of this byte return the current value in the SAR. Writes to this
byte change the SAR to the value written. Bits SAR[9:0] reflect the ten
SAR bits used during the resolution process for an 10-bit result.
RST — Module Reset Bit
When set, this bit causes all registers and activity in the module to
assume the same state as out of power-on reset (except for ADPU bit
in ATDCTL2, which remains set, allowing the ATD module to remain
enabled).
TSTOUT — Multiplex Output of TST[3:0] (Factory Use)
TST[3:0] — Test Bits 3 to 0 (Reserved)
Selects one of 16 reserved factory testing modes
PORTAD — Port AD Data Input Register
RESET:
Bit 7
PAD7
–
6
PAD6
–
5
PAD5
–
4
PAD4
–
3
PAD3
–
2
PAD2
–
1
PAD1
–
Bit 0
PAD0
–
$006F
PAD[7:0] — Port AD Data Input Bits
After reset these bits reflect the state of the input pins.
May be used for general-purpose digital input. When the software
reads PORTAD, it obtains the digital levels that appear on the
corresponding port AD pins. Pins with signals not meeting V_IL or V_IH
specifications will have an indeterminate value. Writes to this register
have no meaning at any time.
MC68HC912BD32 Rev 1.0
Analog to Digital Converter
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Go to: www.freescale.com
10-adc