upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 96
upd70f3017ay
Manufacturer Part Number
upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
upd70f3017ayGC-8EU-A
Manufacturer:
MICROCHIP
Quantity:
1 001
- Current page: 96 of 492
- Download datasheet (4Mb)
4.7 Bus Hold Function
4.7.1 Outline of function
P95 and P96 become valid.
the external address/data bus and strobe pins go into a high-impedance state
status). When the HLDRQ pin becomes inactive (high) indicating that the request for the bus is cleared, these pins
are driven again. During the bus hold period, the internal operation continues until the next external memory access.
configuration is used and when a DMA controller is connected.
access and write access in a read-modify-write access executed using a bit manipulation instruction.
96
When the MM3 bit of the memory expansion mode register (MM) is set (1), the HLDRQ and HLDAK pin functions of
When the HLDRQ pin becomes active (low) indicating that another bus master is requesting acquisition of the bus,
The bus hold status can be recognized by the HLDAK pin becoming active (low).
This feature can be used to design a system where two or more bus masters exist, such as when a multi-processor
A bus hold request is not acknowledged between the first and the second word access, and between the read
Note The A1 to A15 pins are set to the hold state when a separate bus is used.
CHAPTER 4 BUS CONTROL FUNCTION
User’s Manual U12768EJ4V1UD
Note
, and the bus is released (bus hold
Related parts for upd70f3017ay
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas Starter Kit for RX210
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas StarterKit for RX630
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit+ for RX63N
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
FLASH PROGRAMMER FOR RENESAS MICROCONTROLLERS
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet: