PIC12F629/675
When the A/D clock source is something other than
RC, a SLEEPinstruction causes the present conversion
to be aborted, and the A/D module is turned off. The
ADON bit remains set.
7.3
A/D Operation During Sleep
The A/D converter module can operate during Sleep.
This requires the A/D clock source to be set to the
internal RC oscillator. When the RC clock source is
selected, the A/D waits one instruction before starting
the conversion. This allows the SLEEPinstruction to be
executed, thus eliminating much of the switching noise
from the conversion. When the conversion is complete,
the GO/DONE bit is cleared, and the result is loaded
into the ADRESH:ADRESL registers. If the A/D
interrupt is enabled, the device awakens from Sleep. If
the A/D interrupt is not enabled, the A/D module is
turned off, although the ADON bit remains set.
7.4
Effects of Reset
A device Reset forces all registers to their Reset state.
Thus the A/D module is turned off and any pending
conversion is aborted. The ADRESH:ADRESL
registers are unchanged.
TABLE 7-2:
SUMMARY OF A/D REGISTERS
Value on
POR,
BOD
Value on
all other
Resets
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
05h
GPIO
—
—
GPIO5
T0IE
—
GPIO4
INTE
—
GPIO3
GPIE
CMIF
GPIO2
T0IF
—
GPIO1
INTF
—
GPIO0 --xx xxxx --uu uuuu
GPIF 0000 0000 0000 000u
TMR1IF 00-- 0--0 00-- 0--0
0Bh, 8Bh INTCON
GIE
EEIF
PEIE
ADIF
0Ch
1Eh
1Fh
85h
8Ch
9Eh
9Fh
PIR1
ADRESH Most Significant 8 bits of the Left Shifted A/D result or 2 bits of the Right Shifted Result
xxxx xxxx uuuu uuuu
00-- 0000 00-- 0000
ADCON0
TRISIO
PIE1
ADFM
—
VCFG
—
—
—
CHS1
CHS0
GO
ADON
TRISIO5 TRISIO4 TRISIO3 TRISIO2 TRISIO1 TRISIO0 --11 1111 --11 1111
CMIE TMR1IE 00-- 0--0 00-- 0--0
EEIE
ADIE
—
—
—
—
ADRESL Least Significant 2 bits of the Left Shifted A/D Result or 8 bits of the Right Shifted Result
ANSEL ADCS2 ADCS1 ADCS0 ANS3 ANS2 ANS1 ANS0
xxxx xxxx uuuu uuuu
-000 1111 -000 1111
—
Legend: x= unknown, u= unchanged, -= unimplemented read as ‘0’. Shaded cells are not used for A/D converter module.
DS41190G-page 48
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
