CHAPTER 19 IEBus CONTROLLER (V850/SB2)
User’s Manual U13850EJ6V0UD
558
19.2 IEBus Controller Configuration
The block diagram of the IEBus controller is shown below.
Figure 19-10. IEBus Controller Block Diagram
BCR(8)
UAR(12)
SAR(12)
PAR(12)
CDR(8)
DLR(8)
DR(8)
USR(8)
ISR(8)
SSR(8)
SCR(8)
CCR(8)
8
12
12
8
8
8
8
12
8
8
8
8
8
8
8
8
8
8
8
8
NF
RX
TX
MPX
MPX
12-bit latch
Comparator
Contention
detection
ACK
generation
Parity generation
error detection
TX/RX
Interrupt
controller
Interrupt control block
INT request
CPU interface block
Internal
registers
(handler, DMA transfer)
IEBus interface block
CLK
Bit processing block
Field processing block
Internal bus R/W
PSR (8 bits)
8
5
8
12
12
12
Internal bus
8
12
(1) Hardware configuration and function
The IEBus mainly consists of the following six internal blocks.
•
CPU interface block
•
Interrupt control block
•
Internal registers
•
Bit processing block
•
Field processing block
•
IEBus interface block
Содержание V850/SB1
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