M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 556

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

External Buses
5.7 Precautions for External Bus
Figure 5.6.1. Example of releasing the external bus
BCLK
HOLD
HLDA
ALE
CSn
ADi
DBi
RD/WR
(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.
(1) The external ROM version can operate only in the microprocessor mode, so be sure to per-
form the following:
• Connect the CNV
• Fix the processor mode bits (b1 and b0) to “11
(1) (2) (3) (4)
SS
pin to Vcc.
Indeterminate
Bus released
HiZ
HiZ
HiZ
HiZ
(5)(6) (7)
2
”.
(8)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mitsubishi microcomputers
M16C / 62 Group
541