LOGIC COMMANDS AND REGISTERS LOGIC COMMA" />
參數(shù)資料
型號: MC33889DPEGR2
廠商: Freescale Semiconductor
文件頁數(shù): 36/59頁
文件大?。?/td> 0K
描述: IC SYSTEM BASE W/CAN 28SOIC
標(biāo)準(zhǔn)包裝: 1,000
系列: *
Analog Integrated Circuit Device Data
Freescale Semiconductor
41
33889
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
LOGIC COMMANDS AND REGISTERS
SPI INTERFACE
Figure 21. Data Format Description
The SPI is a 8 bit SPI. First 3 bits are used to identify the internal SBC register address, bit 4 is a read/write bit. The last 4 bits
are data send from MCU to SBC or read back from SBC to MCU.
During write operation state of MISO has no signification.
During read operation only the last 4 bits at MISO have a meaning (content of the accessed register)
Following tables describe the SPI register list, and register bit meaning.
Registers “reset value” is also described, as well as the “reset condition”. reset condition is the condition which cause the bit
to be set at the “reset value”.
Possible reset condition are:
Power On Reset: POR
SBC mode transition:
NR2R - Normal Request to Reset mode
NR2N - Normal Request to Normal mode
N2R - Normal to Reset mode
STB2R - Standby to Reset mode
STO2R - Stop to Reset mode
SBC mode:RESET - SBC in Reset mode
MOSI
MISO
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
D0
D1
D2
D3
R/W
A0
A1
A2
data
address
Read operation: R/W bit = 0
Write operation: R/W bit = 1
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