參數(shù)資料
型號: UPD72042BGT
廠商: NEC Corp.
英文描述: LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
中文描述: LSI器件間設(shè)備BusTM(IEBusTM)協(xié)議控制
文件頁數(shù): 59/92頁
文件大小: 541K
代理商: UPD72042BGT
μ
PD72042A, 72042B
59
DATA SHEET S13990EJ2V0DS00
RBF
Address
Read/write
When reset : Undefined
: 1110B (EH)
: Read
Reception buffer
RBF is a 40-byte FIFO buffer used to hold a transmitter address, control bits, data-length bits, and reception data
for master reception, slave reception, or broadcast reception.
RBF can be read by the microcomputer when the REP flag of the STR register is 0 (indicating that RBF is not empty).
When an optional function is set in the CMR register with MFC = 1, multiple communication frames can be held
in RBF until RBF becomes full.
In master reception, slave reception, and broadcast reception, the format below is used to transfer data from RBF
to the microcomputer.
RBF
High-order 4 bits
Low-order 4 bits
Byte 2
Byte 1
Byte 3
Byte 4
Byte 5
Byte 40
Transmitter address (high-order 8 bits)
Transmitter address (low-order 4 bits)
Control bits
Data-length bits
First byte of reception data
Second byte of reception data
Last reception data
Transmitter address (high-order 8 bits)
Transmitter address (low-order 4 bits)
Control bits
Data-length bits
First byte of reception data
Second byte of reception data
Last reception data
Communication frame 1
Communication frame 2
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PDF描述
UPD72042A LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
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UPD72042B LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
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