PIC17C75X Datasheet, PDF (175/320 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers

PIC17C75X
FIGURE 16-7: FLOWCHART OF A/D OPERATION
ADON = 0
Yes
ADON = 0?
No
Acquire
Selected Channel
Yes
GO = 0?
No
Yes
A/D Clock
= RC?
No
Start of A/D
Conversion Delayed
1 Instruction Cycle
Yes
Device in
SLEEP?
No
Finish Conversion
GO = 0,
ADIF = 1
Abort Conversion
GO = 0,
ADIF = 0
SLEEP
Power-down A/D
SLEEP ^Yes
Instruction?
No
Finish Conversion
GO = 0,
ADIF = 1
Wait 2TAD
Finish Conversion
GO = 0,
ADIF = 1
Wake-up ^Yes
From Sleep?
No
Stay in Sleep
Power-down A/D
Wait 2TAD
Wait 2TAD
TABLE 16-3: REGISTERS/BITS ASSOCIATED WITH A/D
Address
Name
Bit 7 Bit 6 Bit 5 Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on: Value on all
POR, other Resets
BOR
(Note 1)
06h, unbanked CPUSTA
—
— STAKAV GLINTD
TO
PD
POR BOR --11 1100
07h, unbanked INTSTA
PEIF T0CKIF T0IF
INTF
PEIE
T0CKIE T0IE INTE 0000 0000
10h, Bank 4 PIR2
SSPIF BCLIF ADIF
—
CA4IF
CA3IF TX2IF RC2IF 000- 0010
11h, Bank 4 PIE2
SSPIE BCLIE ADIE
—
CA4IE
CA3IE TX2IE RC2IE 000- 0000
10h, Bank 5 DDRF Data Direction register for PORTF
1111 1111
11h, Bank 5 PORTF
RF7/
AN11
RF6/
AN10
RF5/
AN9
RF4/
AN8
RF3/
AN7
RF2/
AN6
RF1/
AN5
RF0/ ^{0000 0000}
AN4
12h, Bank 5 DDRG Data Direction register for PORTG
1111 1111
13h, Bank 5
PORTG
RG7/
RG6/
RG5/
TX2/CK2 RX2/DT2 PWM3
RG4/
CAP3
RG3/
RG2/
AN0/VREF+ _AN1/VREF
-
RG1/
AN2
RG0/ ^{xxxx 0000}
AN3
14h, Bank 5 ^{ADCON0 CHS3 CHS2 CHS1 CHS0}
—
GO/DONE — ADON 0000 -0-0
15h, Bank 5 ^{ADCON1 ADCS1 ADCS0 ADFM}
—
PCFG3 PCFG2 PCFG1 PCFG0 000- 0000
16h, Bank 5 ^{ADRESL A/D Result Low Register}
xxxx xxxx
17h, Bank 5 ^{ADRESH A/D Result High Register}
xxxx xxxx
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used for A/D conversion.
Note 1: Other (non power-up) resets include: external reset through MCLR and Watchdog Timer Reset.
--11 qq11
0000 0000
000- 0010
000- 0000
1111 1111
0000 0000
1111 1111
uuuu 0000
0000 -0-0
000- 0000
uuuu uuuu
uuuu uuuu
© 1997 Microchip Technology Inc.
Preliminary
DS30264A-page 175