PIC17C43-16/P Microchip Technology, PIC17C43-16/P Datasheet - Page 15

• Manufacturer Part Number: PIC17C43-16/P
• Description: IC MCU OTP 4KX16 PWM 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 17Cr

Specifications of PIC17C43-16/P

• Core Size: 8-Bit
• Program Memory Size: 8KB (4K 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: 454 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: 454Byte
• 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: 454 B
• Interface Type: SCI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 8
• Operating Supply Voltage: 2.5 V to 6 V
• 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

4.0
The PIC17CXX differentiates between various kinds of
reset:
• Power-on Reset (POR)
• MCLR reset during normal operation
• WDT Reset (normal operation)
Some registers are not affected in any reset condition;
their status is unknown on POR and unchanged in any
other reset. Most other registers are forced to a “reset
state” on Power-on Reset (POR), on MCLR or WDT
Reset and on MCLR reset during SLEEP. They are not
affected by a WDT Reset during SLEEP, since this reset
is viewed as the resumption of normal operation. The
TO and PD bits are set or cleared differently in different
reset situations as indicated in Table 4-3. These bits are
used in software to determine the nature of reset. See
Table 4-4 for a full description of reset states of all reg-
isters.
A simplified block diagram of the on-chip reset circuit is
shown in Figure 4-1.
FIGURE 4-1:
1996 Microchip Technology Inc.
Note:
MCLR
OSC1
† This RC oscillator is shared with the WDT
V
DD
when not in a power-up sequence.
RESET
While the device is in a reset state, the
internal phase clock is held in the Q1 state.
Any processor mode that allows external
execution will force the RE0/ALE pin as a
low output and the RE1/OE and RE2/WR
pins as high outputs.
RC OSC†
OST/PWRT
On-chip
V
Module
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
detect
WDT
DD
rise
OST
PWRT
10-bit Ripple counter
10-bit Ripple counter
Power_On_Reset
Time_Out
Reset
WDT
External
This document was created with FrameMaker 4 0 4
Reset
4.1
4.1.1
The Power-on Reset circuit holds the device in reset
until V
2.3V). The PIC17C42 does not produce an internal
reset when V
an internal reset for both rising and falling V
advantage of the POR, just tie the MCLR/V
directly (or through a resistor) to V
external RC components usually needed to create
Power-on Reset. A minimum rise time for V
required. See Electrical Specifications for details.
4.1.2
The Power-up Timer provides a fixed 96 ms time-out
(nominal) on power-up. This occurs from rising edge of
the POR signal and after the first rising edge of MCLR
(detected high). The Power-up Timer operates on an
internal RC oscillator. The chip is kept in RESET as
long as the PWRT is active. In most cases the PWRT
delay allows the V
The power-up time delay will vary from chip to chip and
to V
details.
Power_Up
(Enable the PWRT timer
only during Power_Up)
(Power_Up + Wake_Up) (XT + LF)
(Enable the OST if it is Power_Up or Wake_Up
from SLEEP and OSC type is XT or LF)
DD
DD
Power-on Reset (POR), Power-up
Timer (PWRT), and Oscillator Start-up
Timer (OST)
POWER-ON RESET (POR)
POWER-UP TIMER (PWRT)
and temperature. See DC parameters for
is above the trip point (in the range of 1.4V -
DD
declines. All other devices will produce
DD
to rise to an acceptable level.
PIC17C4X
S
R
DD
. This will eliminate
DS30412C-page 15
Q
Chip_Reset
DD
. To take
PP
DD
pin
is