m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 357

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 4.5.1. Example of releasing the external bus
Timing chart
(1) An “L” level is input to the HOLD pin.
(2) HOLD is detected.
(3) The CPU releases the bus.
(4) An “L” is output to the HLDA pin.
(5) An “H” is input to the HOLD pin.
(6) An “H” is output to the HLDA pin.
(7) The CPU not releases the bus.
(8) The CPU resumes using the bus.
HOLD
CSn
BCLK
HLDA
ALE
ADi
DBi
RD/WR
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(1) (2) (3) (4)
Indeterminate
Bus released
HiZ
HiZ
HiZ
HiZ
(5) (6) (7)
(8)
4. External Buses