PIC16LF874-04/PQ Microchip Technology, PIC16LF874-04/PQ Datasheet - Page 71
![IC PIC MCU FLASH 4KX14 44MQFP](/photos/6/59/65984/150-44-pqfp_sml.jpg)
PIC16LF874-04/PQ
Manufacturer Part Number
PIC16LF874-04/PQ
Description
IC PIC MCU FLASH 4KX14 44MQFP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheet
1.PIC16F873-04SO.pdf
(218 pages)
Specifications of PIC16LF874-04/PQ
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
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)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
44-MQFP, 44-PQFP
Core
PIC
Processor Series
PIC16LF
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Data Ram Size
192 B
Data Rom Size
128 B
On-chip Adc
8
Number Of Programmable I/os
33
Number Of Timers
3 bit
Operating Supply Voltage
2 V to 5.5 V
Mounting Style
SMD/SMT
Height
2 mm
Interface Type
MSSP, PSP, USART
Length
10 mm
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2 V
Width
10 mm
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16LF874-04/PQ
Manufacturer:
Microchip Technology
Quantity:
10 000
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9.1
The SPI mode allows 8 bits of data to be synchronously
transmitted and received simultaneously. All four
modes of SPI are supported. To accomplish communi-
cation, typically three pins are used:
• Serial Data Out (SDO)
• Serial Data In (SDI)
• Serial Clock (SCK)
Additionally, a fourth pin may be used when in a Slave
mode of operation:
• Slave Select (SS)
When initializing the SPI, several options need to be
specified. This is done by programming the appropriate
control bits (SSPCON<5:0> and SSPSTAT<7:6>).
These control bits allow the following to be specified:
• Master mode (SCK is the clock output)
• Slave mode (SCK is the clock input)
• Clock Polarity (Idle state of SCK)
• Data input sample phase
• Clock edge
• Clock Rate (Master mode only)
• Slave Select mode (Slave mode only)
Figure 9-4 shows the block diagram of the MSSP mod-
ule when in SPI mode.
To enable the serial port, MSSP Enable bit, SSPEN
(SSPCON<5>) must be set. To reset or reconfigure SPI
mode, clear bit SSPEN, re-initialize the SSPCON reg-
isters, and then set bit SSPEN. This configures the
SDI, SDO, SCK and SS pins as serial port pins. For the
pins to behave as the serial port function, some must
have their data direction bits (in the TRIS register)
appropriately programmed. That is:
• SDI is automatically controlled by the SPI module
• SDO must have TRISC<5> cleared
• SCK (Master mode) must have TRISC<3>
• SCK (Slave mode) must have TRISC<3> set
• SS must have TRISA<5> set and register
(middle or end of data output time)
(output data on rising/falling edge of SCK)
cleared
ADCON1 (see Section 11.0: A/D Module) must be
set in a way that pin RA5 is configured as a digital
I/O
2001 Microchip Technology Inc.
SPI Mode
Any serial port function that is not desired may be
overridden by programming the corresponding data
direction (TRIS) register to the opposite value.
FIGURE 9-1:
SDO
SCK
SDI
SS
Read
SS Control
Select
SMP:CKE
Edge
bit0
Enable
Select
Edge
MSSP BLOCK DIAGRAM
(SPI MODE)
Data Direction bit
Data to TX/RX in SSPSR
2
SSPBUF Reg
SSPSR Reg
SSPM3:SSPM0
PIC16F87X
Clock Select
4
2
DS30292C-page 69
Write
Prescaler
4, 16, 64
Clock
Shift
TMR2 Output
Data Bus
Internal
2
T
OSC
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