PIC16F874-04/PT Microchip Technology, PIC16F874-04/PT Datasheet - Page 232
![IC MCU FLASH 4KX14 EE 44TQFP](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC16F874-04/PT
Manufacturer Part Number
PIC16F874-04/PT
Description
IC MCU FLASH 4KX14 EE 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F873-04SO.pdf
(218 pages)
4.PIC16F873-04SO.pdf
(5 pages)
5.PIC16F873-04SO.pdf
(5 pages)
Specifications of PIC16F874-04/PT
Core Size
8-Bit
Program Memory Size
7KB (4K x 14)
Oscillator Type
External
Core Processor
PIC
Speed
4MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
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
Operating Temperature
0°C ~ 70°C
Package / Case
44-TQFP, 44-VQFP
Controller Family/series
PIC16F
No. Of I/o's
33
Eeprom Memory Size
128Byte
Ram Memory Size
192Byte
Cpu Speed
4MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874-04/PT
Manufacturer:
MICROCHIP
Quantity:
4 500
Company:
Part Number:
PIC16F874-04/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F873-04SO PDF datasheet #3
- PIC16F873-04SO PDF datasheet #4
- PIC16F873-04SO PDF datasheet #5
- Current page: 232 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
15.3.6
DS31015A-page 15-12
SS
not optional
SCK
(CKP = 0
CKE = 1)
SCK
(CKP = 1
CKE = 1)
Write to
SSPBUF
SDO
SDI
(SMP = 0)
Input
Sample
(SMP = 0)
SSPIF
Interrupt
Flag
SSPSR to
SSPBUF
Slave Select Mode
When in slave select mode, the SS pin allows multi-drop for multiple slaves with a single
master. The SPI must be in slave mode (SSPCON<3:0> = 04h) and the TRIS bit, for the
SS pin, must be set for the slave select mode to be enabled. When the SS pin is low, trans-
mission and reception are enabled and the SDO pin is driven. When the SS pin goes high,
the SDO pin is no longer driven, even if in the middle of a transmitted byte, and becomes
a floating output. External pull-up/ pull-down resistors may be desirable, depending on the
application.
When the SPI is in Slave Mode with SS pin control enabled, (SSPCON<3:0> = 0100) the SPI
module will reset if the SS pin is set to V
set, then the SS pin control must be enabled.
When the SPI module resets, the bit counter is forced to 0. This can be done by either by forcing
the SS pin to a high level or clearing the SSPEN bit
To emulate two-wire communication, the SDO pin can be connected to the SDI pin. When the
SPI needs to operate as a receiver the SDO pin can be configured as an input. This disables
transmissions from the SDO. The SDI can always be left as an input (SDI function) since it cannot
create a bus conflict.
Figure 15-5:
bit7
bit7
SPI Mode Waveform (Slave Select Mode With CKE = 1)
bit6
bit5
bit4
DD
. If the SPI is used in Slave Mode with the CKE bit is
bit3
(Figure
bit2
15-6).
bit1
1997 Microchip Technology Inc.
bit0
bit0
Next Q4 cycle
after Q2
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