C8051F537-IT Silicon Laboratories Inc, C8051F537-IT Datasheet - Page 153
![IC 8051 MCU 2K FLASH 20TSSOP](/photos/12/46/124608/silicon_laboratories_inc-20-tssop_sml.jpg)
C8051F537-IT
Manufacturer Part Number
C8051F537-IT
Description
IC 8051 MCU 2K FLASH 20TSSOP
Manufacturer
Silicon Laboratories Inc
Series
C8051F53xr
Specifications of C8051F537-IT
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.25 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
336-1401
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F537-IT
Manufacturer:
Silicon Labs
Quantity:
135
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16.3. SPI0 Slave Mode Operation
When SPI0 is enabled and not configured as a master, it will operate as a SPI slave. As a slave, bytes are
shifted in through the MOSI pin and out through the MISO pin by a master device controlling the SCK sig-
nal. A bit counter in the SPI0 logic counts SCK edges. When 8 bits have been shifted into the shift register,
the SPIF flag is set to logic 1, and the byte is copied into the receive buffer. Data is read from the receive
buffer by reading SPI0DAT. A slave device cannot initiate transfers. Data to be transferred to the master
device is pre-loaded into the shift register by writing to SPI0DAT. Writes to SPI0DAT are double-buffered,
and are placed in the transmit buffer first. If the shift register is empty, the contents of the transmit buffer
will immediately be transferred into the shift register. When the shift register already contains data, the SPI
will load the shift register with the transmit buffer’s contents after the last SCK edge of the next (or current)
SPI transfer.
Figure 16.3. 3-Wire Single Master and Slave Mode Connection Diagram
Figure 16.4. 4-Wire Single Master and Slave Mode Connection Diagram
Figure 16.2. Multiple-Master Mode Connection Diagram
Device 1
Master
Master
Device
Master
Device
GPIO
C8051F52x/F52xA/F53x/F53xA
MISO
MOSI
GPIO
MISO
MOSI
MISO
MOSI
NSS
SCK
SCK
SCK
NSS
Rev. 1.3
GPIO
MISO
MOSI
SCK
NSS
MISO
MOSI
SCK
MISO
MOSI
SCK
NSS
MISO
MOSI
SCK
NSS
Device 2
Master
Device
Device
Device
Slave
Slave
Slave
153
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