MC68HC11F1MFN2 FREESCALE [Freescale Semiconductor, Inc], MC68HC11F1MFN2 Datasheet - Page 49
MC68HC11F1MFN2
Manufacturer Part Number
MC68HC11F1MFN2
Description
Technical Summary 8-Bit Microcontroller
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC11F1MFN2.pdf
(68 pages)
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10 Serial Peripheral Interface
10.1 SPI Block Diagram
MC68HC11F1/FC0
MC68HC11FTS/D
The serial peripheral interface (SPI) allows the MCU to communicate synchronously with peripheral de-
vices and other microprocessors. The SPI protocol facilitates rapid exchange of serial data between de-
vices in a control system. The MC68HC11F1 and MC68HC11FC0 can be set up for master or slave
operation. Standard data rates can be as high as one half of the E-clock rate when configured as mas-
ter, and as fast as the E-clock when configured as slave.
The MC68HC11FC0 has an additional control bit that allows the SPI baud rate counter to be bypassed.
This allows a master mode baud rate equal to the E-clock frequency.
MCU CLOCK
INTERNAL
PRESENT ON MC68HC11FC0 ONLY
DOTTED LINE CONNECTIONS
SPIE
SPE
DWOM
MSTR
CPHA
CPOL
SPR1
SPR0
SPRBYP
Freescale Semiconductor, Inc.
For More Information On This Product,
16
32
2
4
Figure 12 SPI Block Diagram
Go to: www.freescale.com
SPR0
SPR1
SPI STATUS REGISTER
MSB
8-BIT SHIFT REGISTER
READ DATA BUFFER
CLOCK LOGIC
MSTR
SPIE
SPE
CONTROL
SPI
LSB
SPI INTERRUPT
M
M
S
S
M
S
REQUEST
MOSI
MISO
SCK
PD5
PD4
PD3
PD2
SS
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