CHAPTER 2 PIN FUNCTIONS
User’s Manual U13850EJ4V0UM
58
2.2 Pin States
The operating states of various pins are described below with reference to their operation modes.
Table 2-3. Pin Operating State in Operation Mode
Operation Mode
Pin
Reset
STOP Mode
IDLE Mode
HALT Mode
Bus Hold
Idle State
AD0 to AD15
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
A1 to A15
Hi-Z
Held
Held
Held
Held
Held
A16 to A21
Hi-Z
Hi-Z
Hi-Z
Held
Hi-Z
Held
LBEN, UBEN
Hi-Z
Hi-Z
Hi-Z
Held
Hi-Z
Held
R/W
Hi-Z
Hi-Z
Hi-Z
H
Hi-Z
H
DSTB, WRL, WRH, RD
Hi-Z
Hi-Z
Hi-Z
H
Hi-Z
H
ASTB
Hi-Z
Hi-Z
Hi-Z
H
Hi-Z
H
HLDRQ
−
−
−
Operating
Operating
Operating
HLDAK
Hi-Z
Hi-Z
Hi-Z
Operating
L
Operating
WAIT
−
−
−
−
−
−
CLKOUT
Hi-Z
L
L
Operating
Note
Operating
Note
Operating
Note
Note
“L” when in clock output inhibit mode
Remark
Hi-Z:
High impedance
Held: State is held during previously set external bus cycle
L:
Low-level output
H:
High-level output
−
:
Input without being sampled
Содержание MPD703030A
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