PIC16F737-E/SP Microchip Technology, PIC16F737-E/SP Datasheet - Page 42
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PIC16F737-E/SP
Manufacturer Part Number
PIC16F737-E/SP
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,DIP,28PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F737-ISP.pdf
(276 pages)
4.PIC16F737-ISP.pdf
(10 pages)
Specifications of PIC16F737-E/SP
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
25
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Ram Size
368 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3DBF777 - BOARD DAUGHTER ICEPIC3
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F737-ISP PDF datasheet #3
- PIC16F737-ISP PDF datasheet #4
- Current page: 42 of 276
- Download datasheet (6Mb)
PIC16F7X7
4.6.5
The following are three different sequences for
switching the internal RC oscillator frequency:
• Clock before switch: 31.25 kHz
• Clock before switch: One of INTOSC/INTOSC
TABLE 4-3:
DS30498C-page 40
(31.25 kHz)
(31.25 kHz)
Note 1:
Sleep/POR
(IRCF<2:0> = 000)
1. IRCF bits are modified to an INTOSC/INTOSC
2. The clock switching circuitry waits for a falling
3. The clock switching circuitry then waits for eight
4. The IOFS bit is clear to indicate that the clock is
5. Switchover is complete.
postscaler (IRCF<2:0>
1. IRCF
2. The clock switching circuitry waits for a falling
3. The clock switching circuitry then waits for eight
4. Oscillator switchover is complete.
INTRC/
INTRC
INTRC
From
Sleep
Sleep
postscaler frequency.
edge of the current clock, at which point CLKO
is held low.
falling edges of requested clock, after which it
switches CLKO to this new clock source.
unstable and a 4 ms (approx.) delay is started.
Time dependent code should wait for IOFS to
become set.
(IRCF<2:0> = 000).
edge of the current clock, at which point CLKO
is held low.
falling edges of requested clock, after which it
switches CLKO to this new clock source.
Clock Switch
The 5 s-10 s start-up delay is based on a 1 MHz system clock.
CLOCK TRANSITION SEQUENCE
INTOSC/INTOSC
INTOSC/INTOSC
bits
LP, XT, HS
Postscaler
Postscaler
OSCILLATOR DELAY EXAMPLES
EC, RC
EC, RC
T1OSC
INTRC
are
To
000)
modified
32.768 kHz-20 MHz
125 kHz-8 MHz
125 kHz-8 MHz
DC – 20 MHz
DC – 20 MHz
Frequency
32.768 kHz
31.25 kHz
to
INTRC
4 ms (approx.) and
1024 Clock Cycles
Oscillator Delay
CPU Start-up
CPU Start-up
4 ms (approx.)
• Clock before switch: One of INTOSC/INTOSC
4.6.6
Table 4-3 shows the different delays invoked for
various clock switching sequences. It also shows the
delays invoked for POR and wake-up.
postscaler (IRCF<2:0>
1. IRCF bits are modified to a different INTOSC/
2. The clock switching circuitry waits for a falling
3. The clock switching circuitry then waits for
4. The IOFS bit is set.
5. Oscillator switchover is complete.
INTOSC postscaler frequency.
edge of the current clock, at which point CLKO
is held low.
eight falling edges of requested clock, after
which it switches CLKO to this new clock
source.
(1)
(1)
OSCILLATOR DELAY UPON
POWER-UP, WAKE-UP AND CLOCK
SWITCHING
Following a wake-up from Sleep mode
or POR, CPU start-up is invoked to
allow the CPU to become ready for
code execution.
Following a change from INTRC, the
OST count of 1024 cycles must occur.
Refer to Section 4.6.4 “Modifying the
IRCF Bits” for further details.
2004 Microchip Technology Inc.
000)
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