PIC16F874A-E/L Microchip Technology, PIC16F874A-E/L Datasheet - Page 41
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC](/photos/6/63/66325/150-44-plcc_sml.jpg)
PIC16F874A-E/L
Manufacturer Part Number
PIC16F874A-E/L
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC
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/L
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
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
44-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-E/L
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16C770-ISO PDF datasheet #3
- PIC16F873A-ISO PDF datasheet #4
- PIC16F873A-ISO PDF datasheet #5
- PIC16F873A-ISO PDF datasheet #6
- PIC16F873A-ISO PDF datasheet #7
- PIC16F873A-ISO PDF datasheet #8
- PIC16F873A-ISO PDF datasheet #9
- Current page: 41 of 234
- Download datasheet (5Mb)
3.7
There are conditions when the device should not write
to the data EEPROM or Flash program memory. To
protect against spurious writes, various mechanisms
have been built-in. On power-up, WREN is cleared.
Also, the Power-up Timer (72 ms duration) prevents an
EEPROM write.
The write initiate sequence and the WREN bit together
help prevent an accidental write during brown-out,
power glitch or software malfunction.
TABLE 3-1:
2003 Microchip Technology Inc.
10Ch
10Dh
10Eh
10Fh
18Ch
18Dh
0Dh
8Dh
Legend:
Address
Protection Against Spurious Write
x = unknown, u = unchanged, - = unimplemented, read as ‘0’, q = value depends upon condition.
Shaded cells are not used by data EEPROM or Flash program memory.
EEDATA
EEADR
EEDATH
EEADRH
EECON1
EECON2 EEPROM Control Register 2 (not a physical register)
PIR2
PIE2
Name
REGISTERS/BITS ASSOCIATED WITH DATA EEPROM AND
FLASH PROGRAM MEMORIES
EEPROM/Flash Data Register Low Byte
EEPROM/Flash Address Register Low Byte
EEPGD
Bit 7
—
—
—
—
CMIE
CMIF
Bit 6
—
—
—
EEPROM/Flash Data Register High Byte
Bit 5
—
—
—
—
EEPROM/Flash Address Register High Byte
EEIF
EEIE
Bit 4
—
WRERR
BCLIE
BCLIF
Bit 3
3.8
When the data EEPROM is code-protected, the micro-
controller can read and write to the EEPROM normally.
However, all external access to the EEPROM is
disabled. External write access to the program memory
is also disabled.
When program memory is code-protected, the microcon-
troller can read and write to program memory normally,
as well as execute instructions. Writes by the device may
be selectively inhibited to regions of the memory depend-
ing on the setting of bits WR1:WR0 of the configuration
word (see Section 14.1 “Configuration Bits” for addi-
tional information). External access to the memory is also
disabled.
WREN
Bit 2
—
—
Operation During Code-Protect
Bit 1
WR
—
—
CCP2IF
CCP2IE
PIC16F87XA
Bit 0
RD
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
xxxx xxxx ---0 q000
xxxx xxxx ---- ----
x--- x000 ---0 q000
---- ---- ---- ----
-0-0 0--0 -0-0 0--0
-0-0 0--0 -0-0 0--0
Power-on
Value on
Reset
DS39582B-page 39
Value on
all other
Resets
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