PIC12F615-E/MF Microchip Technology, PIC12F615-E/MF Datasheet - Page 49
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PIC12F615-E/MF
Manufacturer Part Number
PIC12F615-E/MF
Description
IC PIC MCU FLASH 1KX14 8DFN
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Datasheets
1.PIC12F609T-ISN.pdf
(212 pages)
2.PIC12F609T-ISN.pdf
(26 pages)
3.PIC12F609T-ISN.pdf
(8 pages)
4.PIC12F615-EMF.pdf
(196 pages)
Specifications of PIC12F615-E/MF
Program Memory Type
FLASH
Program Memory Size
1.75KB (1K x 14)
Package / Case
8-DFN
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
5
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
PIC12F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
64 B
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
5
Number Of Timers
3
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 4 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
APGRD004 - REF DESIGN MOD AUTO AMBNT LIGHTAC164324 - MODULE SKT FOR MPLAB 8DFN/16QFN
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
6.2.1
When the internal clock source is selected, the
TMR1H:TMR1L register pair will increment on multiples
of T
6.2.2
When the external clock source is selected, the Timer1
module may work as a timer or a counter.
When counting, Timer1 is incremented on the rising
edge of the external clock input T1CKI. In addition, the
Counter mode clock can be synchronized to the
microcontroller system clock or run asynchronously.
If an external clock oscillator is needed (and the
microcontroller is using the INTOSC without CLKOUT),
Timer1 can use the LP oscillator as a clock source.
In Counter mode, a falling edge must be registered by
the counter prior to the first incrementing rising edge
after one or more of the following conditions:
• Timer1 is enabled after POR or BOR Reset
• A write to TMR1H or TMR1L
• T1CKI is high when Timer1 is disabled and when
6.3
Timer1 has four prescaler options allowing 1, 2, 4 or 8
divisions of the clock input. The T1CKPS bits of the
T1CON register control the prescale counter. The
prescale counter is not directly readable or writable;
however, the prescaler counter is cleared upon a write to
TMR1H or TMR1L.
6.4
A low-power 32.768 kHz crystal oscillator is built-in
between pins OSC1 (input) and OSC2 (output). The
oscillator is enabled by setting the T1OSCEN control
bit of the T1CON register. The oscillator will continue to
run during Sleep.
The Timer1 oscillator is shared with the system LP
oscillator. Thus, Timer1 can use this mode only when
the primary system clock is derived from the internal
oscillator or when in LP oscillator mode. The user must
provide a software time delay to ensure proper oscilla-
tor start-up.
TRISIO5 and TRISIO4 bits are set when the Timer1
oscillator is enabled. GP5 and GP4 bits read as ‘0’ and
TRISIO5 and TRISIO4 bits read as ‘1’.
© 2008 Microchip Technology Inc.
Timer1 is reenabled T1CKI is low. See Figure 6-2.
Note:
CY
as determined by the Timer1 prescaler.
Timer1 Prescaler
Timer1 Oscillator
INTERNAL CLOCK SOURCE
EXTERNAL CLOCK SOURCE
The oscillator requires a start-up and
stabilization time before use. Thus,
T1OSCEN should be set and a suitable
delay observed prior to enabling Timer1.
PIC12F609/615/12HV609/615
6.5
If control bit T1SYNC of the T1CON register is set, the
external clock input is not synchronized. The timer
continues to increment asynchronous to the internal
phase clocks. The timer will continue to run during
Sleep and can generate an interrupt on overflow,
which will wake-up the processor. However, special
precautions in software are needed to read/write the
timer (see Section 6.5.1 “Reading and Writing
Timer1 in Asynchronous Counter Mode”).
6.5.1
Reading TMR1H or TMR1L while the timer is running
from an external asynchronous clock will ensure a valid
read (taken care of in hardware). However, the user
should keep in mind that reading the 16-bit timer in two
8-bit values itself poses certain problems, since the
timer may overflow between the reads.
For writes, it is recommended that the user simply stop
the timer and write the desired values. A write
contention may occur by writing to the timer registers,
while the register is incrementing. This may produce an
unpredictable value in the TMR1H:TTMR1L register
pair.
Note:
Note:
Timer1 Operation in
Asynchronous Counter Mode
When switching from synchronous to
asynchronous operation, it is possible to
skip an increment. When switching from
asynchronous to synchronous operation,
it is possible to produce a single spurious
increment.
In asynchronous counter mode or when
using the internal oscillator and T1ACS=1,
Timer1 can not be used as a time base for
the capture or compare modes of the
ECCP module (for PIC12F615/HV615
only).
READING AND WRITING TIMER1 IN
ASYNCHRONOUS COUNTER
MODE
DS41302B-page 47