PIC16LF1933-E/MV Microchip Technology, PIC16LF1933-E/MV Datasheet - Page 227
PIC16LF1933-E/MV
Manufacturer Part Number
PIC16LF1933-E/MV
Description
IC MCU 8BIT 7KB FLASH 28UQFN
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Datasheet
1.PIC16LF1933-IMV.pdf
(430 pages)
Specifications of PIC16LF1933-E/MV
Core Processor
PIC
Core Size
8-Bit
Speed
32MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
25
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
28-UFQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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24.2.3
The master can initiate the data transfer at any time
because it controls the SCK line. The master
determines when the slave (Processor 2,
is to broadcast data by the software protocol.
In Master mode, the data is transmitted/received as
soon as the SSPBUF register is written to. If the SPI is
only going to receive, the SDO output could be dis-
abled (programmed as an input). The SSPSR register
will continue to shift in the signal present on the SDI pin
at the programmed clock rate. As each byte is
received, it will be loaded into the SSPBUF register as
if a normal received byte (interrupts and Status bits
appropriately set).
FIGURE 24-6:
2011 Microchip Technology Inc.
Write to
SSPBUF
SCK
(CKP = 0
CKE = 0)
SCK
(CKP = 1
CKE = 0)
SCK
(CKP = 0
CKE = 1)
SCK
(CKP = 1
CKE = 1)
SDO
(CKE = 0)
SDO
(CKE = 1)
SDI
(SMP = 0)
Input
Sample
(SMP = 0)
SDI
(SMP = 1)
Input
Sample
(SMP = 1)
SSPIF
SSPSR to
SSPBUF
SPI MASTER MODE
SPI MODE WAVEFORM (MASTER MODE)
bit 7
bit 7
bit 7
bit 7
bit 6
bit 6
Figure
bit 5
bit 5
24-5)
Preliminary
bit 4
bit 4
bit 3
bit 3
The clock polarity is selected by appropriately
programming the CKP bit of the SSPCON1 register
and the CKE bit of the SSPSTAT register. This then,
would give waveforms for SPI communication as
shown in
where the MSB is transmitted first. In Master mode, the
SPI clock rate (bit rate) is user programmable to be one
of the following:
• F
• F
• F
• Timer2 output/2
• Fosc/(4 * (SSPADD + 1))
Figure 24-6
When the CKE bit is set, the SDO data is valid before
there is a clock edge on SCK. The change of the input
sample is shown based on the state of the SMP bit. The
time when the SSPBUF is loaded with the received
data is shown.
OSC
OSC
OSC
/4 (or T
/16 (or 4 * T
/64 (or 16 * T
bit 2
bit 2
Figure
shows the waveforms for Master mode.
CY
PIC16(L)F1933
)
bit 1
bit 1
24-6,
CY
CY
)
)
Figure 24-8
bit 0
bit 0
bit 0
bit 0
DS41575A-page 227
and
4 Clock
Modes
Figure
24-9,
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