PIC16F685-E/SO Microchip Technology, PIC16F685-E/SO Datasheet - Page 7

• Manufacturer Part Number: PIC16F685-E/SO
• Description: IC PIC MCU FLASH 4KX14 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F685-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SOIC (7.5mm Width)
• For Use With: XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICAC162061 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

3. Module: ECCP with Auto-Shutdown
FIGURE 8-2:
 2010 Microchip Technology Inc.
The PIC16F631/677/685/687/689/690 Rev. A4
silicon for the ECCP auto-shutdown is connected
to the C1IF and C2IF flags. See Figures 8-2
and 8-3 on the following page.
The auto-shutdown connection (Rev. A4 and
previous) to C1IF and C2IF causes the auto-
shutdown to incorrectly operate synchronously.
Additionally, reads of CMxCON0 will incorrectly
clear an auto-shutdown event.
Work around
Rev. A4 Silicon and previous revisions.
1)
2)
3)
FixedRef
CV
C1V
Poll the CxOUT bit until it is low.
Read CMxCON0 to precondition CxIF.
If CMxCON0 is read while CxOUT is
changing, repeat steps 1 and 2.
REF
REN
C12IN0-
C12IN1-
C12IN2-
C12IN3-
(Silicon Rev. A4 and previous
revisions) (PIC16F685 and
PIC16F690 only)
C1IN+
C1CH<1:0>
0
1
MUX
COMPARATOR C1 SIMPLIFIED BLOCK DIAGRAM
C1R
0
1
2
3
0
1
Note 1:
2
MUX
MUX
2:
3:
PIC16F631/677/685/687/689/690
When C1ON = 0, the C1 comparator will produce a ‘0’ output to the XOR Gate.
Q1 and Q3 are phases of the four-phase system clock (F
Q1 is held high during Sleep mode.
C1V
C1V
IN
IN
-
+
+
-
C1
C1ON
C1POL
(1)
Q3*RD_CM1CON0
Q1
Fix
Rev. A5 Silicon and later revisions.
The Silicon Rev. A5 (now shipping) and later
revision devices have moved the auto-shutdown
connection from CxIF to CxOUT. This will eliminate
the synchronous shutdown and simplify the use of
the comparator for a shutdown event. Figure 1
shows the function of auto-shutdown before and
after the device revision.
Affected Silicon Revisions
PIC16F685
PIC16F690
A3
A3
X
X
NRESET
D
EN
C1OUT
A4
A4
Q
X
X
D
EN
C1POL
CL
A5
A5
X
Q
Rev. A5: To ECCP
A6
A6
To ECCP Auto-Shutdown
Auto-Shutdown
X
To other peripherals
C1OUT (to SR latch)
OSC
Rev. A4 and previous:
RD_CM1CON0
).
Data Bus
Set C1IF
DS80243M-page 7
To