PIC16F874A-E/P Microchip Technology, PIC16F874A-E/P Datasheet - Page 63
![IC MCU FLASH 4KX14 W/AD 40-DIP](/photos/6/61/66192/150-40-dip_sml.jpg)
PIC16F874A-E/P
Manufacturer Part Number
PIC16F874A-E/P
Description
IC MCU FLASH 4KX14 W/AD 40-DIP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873A-ISO.pdf
(234 pages)
5.PIC16F873A-ISO.pdf
(6 pages)
6.PIC16F873A-ISO.pdf
(4 pages)
7.PIC16F873A-ISO.pdf
(6 pages)
8.PIC16F873A-ISO.pdf
(4 pages)
9.PIC16F873A-ISO.pdf
(22 pages)
Specifications of PIC16F874A-E/P
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
33
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
192 B
Interface Type
I2C, SPI, USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
33
Number Of Timers
1 x 16 bit
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
Minimum Operating Temperature
- 40 C
On-chip Adc
8
Data Rom Size
128 B
Height
3.81 mm
Length
52.26 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4 V
Width
13.84 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
7.0
Timer2 is an 8-bit timer with a prescaler and a
postscaler. It can be used as the PWM time base for the
PWM mode of the CCP module(s). The TMR2 register
is readable and writable and is cleared on any device
Reset.
The input clock (F
1:1,
T2CKPS1:T2CKPS0 (T2CON<1:0>).
The Timer2 module has an 8-bit period register, PR2.
Timer2 increments from 00h until it matches PR2 and
then resets to 00h on the next increment cycle. PR2 is
a readable and writable register. The PR2 register is
initialized to FFh upon Reset.
The match output of TMR2 goes through a 4-bit
postscaler (which gives a 1:1 to 1:16 scaling inclusive)
to generate a TMR2 interrupt (latched in flag bit,
TMR2IF (PIR1<1>)).
Timer2 can be shut-off by clearing control bit, TMR2ON
(T2CON<2>), to minimize power consumption.
REGISTER 7-1:
2003 Microchip Technology Inc.
1:4
TIMER2 MODULE
bit 7
bit 6-3
bit 2
bit 1-0
or
1:16,
OSC
T2CON: TIMER2 CONTROL REGISTER (ADDRESS 12h)
/4) has a prescale option of
bit 7
Unimplemented: Read as ‘0’
TOUTPS3:TOUTPS0: Timer2 Output Postscale Select bits
0000 = 1:1 postscale
0001 = 1:2 postscale
0010 = 1:3 postscale
•
•
•
1111 = 1:16 postscale
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
T2CKPS1:T2CKPS0: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
Legend:
R = Readable bit
- n = Value at POR
selected
U-0
—
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0
by
R/W-0
control
R/W-0
bits
W = Writable bit
‘1’ = Bit is set
R/W-0
Register 7-1 shows the Timer2 Control register.
Additional information on timer modules is available in
the PICmicro
Manual (DS33023).
FIGURE 7-1:
Note 1: TMR2 register output can be software selected by the
Sets Flag
bit TMR2IF
T2OUTPS3:
T2OUTPS0
Postscaler
1:1 to 1:16
R/W-0
SSP module as a baud clock.
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
4
®
TMR2
Output
Reset
Mid-Range MCU Family Reference
EQ
(1)
R/W-0
PIC16F87XA
Comparator
TIMER2 BLOCK DIAGRAM
TMR2 Reg
PR2 Reg
x = Bit is unknown
R/W-0
1:1, 1:4, 1:16
T2CKPS1:
T2CKPS0
Prescaler
DS39582B-page 61
2
R/W-0
F
OSC
bit 0
/4