CHAPTER 19 IEBus CONTROLLER (V850/SB2)
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(a) CPU interface block
This is a control block that interfaces between the CPU (V850/SB2) and IEBus.
(b) Interrupt control block
This control block transfers interrupt request signals from IEBus to the CPU.
(c) Internal registers
These registers set data to the control registers and fields that control IEBus (for the internal registers,
refer to
19.3 Internal Registers of IEBus Controller
).
(d) Bit processing block
This block generates and disassembles bit timing, and mainly consists of a bit sequence ROM, 8-bit
preset timer, and comparator.
(e) Field processing block
This block generates each field in the communication frame, and mainly consists of a field sequence
ROM, 4-bit down counter, and comparator.
(f) IEBus interface block
This is the interface block for an external driver/receiver, and mainly consists of a noise filter, shift
register, collision detector, parity detector, parity generator, and ACK/NACK generator.
Содержание MPD703030A
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