PIC17C42A-16/P Microchip Technology, PIC17C42A-16/P Datasheet - Page 103
![IC MCU OTP 2KX16 PWM 40DIP](/photos/6/61/66192/150-40-dip_sml.jpg)
PIC17C42A-16/P
Manufacturer Part Number
PIC17C42A-16/P
Description
IC MCU OTP 2KX16 PWM 40DIP
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C42A-16P.pdf
(241 pages)
3.PIC17C42A-16P.pdf
(4 pages)
Specifications of PIC17C42A-16/P
Core Size
8-Bit
Program Memory Size
4KB (2K x 16)
Core Processor
PIC
Speed
16MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
33
Program Memory Type
OTP
Ram Size
232 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 6 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
PIC17
No. Of I/o's
33
Ram Memory Size
232Byte
Cpu Speed
16MHz
No. Of Timers
4
No. Of Pwm Channels
2
Embedded Interface Type
USART
Rohs Compliant
Yes
Processor Series
PIC17C
Core
PIC
Data Bus Width
8 bit
Data Ram Size
232 B
Interface Type
SCI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
33
Number Of Timers
4
Maximum Operating Temperature
+ 70 C
Mounting Style
Through Hole
Development Tools By Supplier
ICE2000
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DVA17XP401 - DEVICE ADAPTER FOR PIC17C42AAC174001 - MODULE SKT PROMATEII 40DIP
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC17C42A-16/PQ
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC17C42A-16/PQ
Manufacturer:
MICROCH
Quantity:
20 000
Company:
Part Number:
PIC17C42A-16/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
14.3
The Watchdog Timer’s function is to recover from soft-
ware malfunction. The WDT uses an internal free run-
ning on-chip RC oscillator for its clock source. This
does not require any external components. This RC
oscillator is separate from the RC oscillator of the
OSC1/CLKIN pin. That means that the WDT will run,
even if the clock on the OSC1/CLKIN and OSC2/CLK-
OUT pins of the device has been stopped, for example,
by execution of a SLEEP instruction. During normal
operation and SLEEP mode, a WDT time-out gener-
ates a device RESET. The WDT can be permanently
disabled by programming the configuration bits
WDTPS1:WDTPS0 as ' 00 ' (Section 14.1).
Under normal operation, the WDT must be cleared on
a regular interval. This time is less the minimum WDT
overflow time. Not clearing the WDT in this time frame
will cause the WDT to overflow and reset the device.
14.3.1
The WDT has a nominal time-out period of 12 ms, (with
postscaler = 1). The time-out periods vary with temper-
ature, V
DC specs). If longer time-out periods are desired, a
postscaler with a division ratio of up to 1:256 can be
assigned to the WDT. Thus, typical time-out periods up
to 3.0 seconds can be realized.
The CLRWDT and SLEEP instructions clear the WDT
and the postscaler (if assigned to the WDT) and pre-
vent it from timing out thus generating a device RESET
condition.
The TO bit in the CPUSTA register will be cleared upon
a WDT time-out.
1996 Microchip Technology Inc.
DD
Watchdog Timer (WDT)
WDT PERIOD
and process variations from part to part (see
14.3.2
The WDT and postscaler are cleared when:
• The device is in the reset state
• A SLEEP instruction is executed
• A CLRWDT instruction is executed
• Wake-up from SLEEP by an interrupt
The WDT counter/postscaler will start counting on the
first edge after the device exits the reset state.
14.3.3
It should also be taken in account that under worst case
conditions (V
WDT postscaler) it may take several seconds before a
WDT time-out occurs.
The WDT and postscaler is the Power-up Timer during
the Power-on Reset sequence.
14.3.4
When the WDT is selected as a normal timer, the clock
source is the device clock. Neither the WDT nor the
postscaler are directly readable or writable. The over-
flow time is 65536 T
is cleared (device is not reset). The CLRWDT instruction
can be used to set the TO bit. This allows the WDT to
be a simple overflow timer. When in sleep, the WDT
does not increment.
CLEARING THE WDT AND POSTSCALER
WDT PROGRAMMING CONSIDERATIONS
WDT AS NORMAL TIMER
DD
= Min., Temperature = Max., max.
OSC
cycles. On overflow, the TO bit
PIC17C4X
DS30412C-page 103