參數(shù)資料
型號(hào): MC68HC11KA4TS
廠商: Motorola, Inc.
英文描述: KPT 3C 3#16 PIN PLUG
中文描述: 8位微控制器
文件頁(yè)數(shù): 44/68頁(yè)
文件大?。?/td> 365K
代理商: MC68HC11KA4TS
MOTOROLA
44
MC68HC11KA4
MC68HC11KA4TS/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
SPI BLOCK 2SPR
S
S
C
C
M
D
S
S
SPI CONTROL REGISTER
M
W
S
SPI STATUS REGISTER
8/16-BIT SHIFT REGISTER
READ DATA BUFFER
MSB
LSB
INTERNAL
DATA BUS
SPI INTERRUPT
REQUEST
MSTR
SPE
M
D
S
S
SPI CLOCK (MASTER)
SPI CONTROL
SELECT
DIVIDER
÷
4
INTERNAL
MCU CLOCK
CLOCK
LOGIC
CLOCK
P
S
M
S
M
M
S
MISO
PD2
MOSI
PD3
SCK
PD4
SS
PD5
S
÷
2
÷
16
÷
32
8
8
8
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