參數(shù)資料
型號(hào): MC68HC11K4MFN2
廠商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: Technical Summary 8-Bit Microcontroller
中文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC84
封裝: PLASTIC, LCC-84
文件頁(yè)數(shù): 56/80頁(yè)
文件大?。?/td> 420K
代理商: MC68HC11K4MFN2
MOTOROLA
56
M68HC11 K Series
MC68HC11KTS/D
8 Serial Peripheral Interface
The SPI allows the MCU to communicate synchronously with peripheral devices and other micropro-
cessors. Data rates can be as high as 2 Mbits per second when configured as a master and 4 Mbits per
second when configured as a slave (assuming 4 MHz bus speed).
Two control bits in OPT2 allow the transfer of data either MSB or LSB first and select an additional divide
by four stage to be inserted before the SPI baud rate clock divider.
Figure 12 SPI Block Diagram
L
OPTIONS REGISTER 2
INTERNAL
MCU CLOCK
DIVIDER
SELECT
SPI CLOCK (MASTER)
8-BIT SHIFT REGISTER
READ DATA BUFFER
MSB
CLOCK
LOGIC
S
M
M
S
PIN
CONTROL
LOGIC
MISO/
PD2
MOSI/
PD3
SCK/
PD4
SS/
PD5
M
S
M
S
D
S
MSTR
SPE
SPIE
S
S
D
M
C
C
S
S
SPCR
SPI CONTROL REGISTER
S
W
M
SPSR
SPI STATUS REGISTER
SPI CONTROL
INTERNAL
DATA BUS
SPI INTERRUPT
REQUEST
÷
2
÷
4
÷
16
÷
32
÷
8
÷
16
÷
64
÷
128
L
8
8
8
S
S
LSB
CLOCK
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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