參數(shù)資料
型號(hào): MC68L11F1PU3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: Technical Summary 8-Bit Microcontroller
中文描述: 8-BIT, EEPROM, MICROCONTROLLER, PQFP80
封裝: TQFP-80
文件頁數(shù): 49/68頁
文件大小: 486K
代理商: MC68L11F1PU3
MC68HC11F1/FC0
MC68HC11FTS/D
MOTOROLA
49
10 Serial Peripheral Interface
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.
10.1 SPI Block Diagram
Figure 12 SPI Block Diagram
S
O
INTERNAL
MCU CLOCK
÷
2
÷
4
÷
16
÷
32
D
S
SPRBYP
S
SPIE
SPE
DWOM
MSTR
CPHA
CPOL
DOTTED LINE CONNECTIONS
PRESENT ON MC68HC11FC0 ONLY
8-BIT SHIFT REGISTER
READ DATA BUFFER
MSB
LSB
C
M
M
S
S
MISO
PD2
MOSI
PD3
M
S
SCK
PD4
CLOCK LOGIC
SS
PD5
SPR1
SPR0
P
S
W
M
SPI STATUS REGISTER
SPR0
SPR1
M
C
C
SPIE
SPE
MSTR
SPI
CONTROL
M
W
S
S
D
M
I
SPI INTERRUPT
REQUEST
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