CHAPTER 2 PIN FUNCTIONS
47
User’s Manual U14492EJ3V0UD
2.2
Pin Status
The following table shows the status of each pin after a reset, in power-saving mode (software STOP mode, IDLE,
HALT), on a DMA transfer, and on a bus hold.
Operating Status
Pin
Reset
(Single-Chip
Mode 0)
Reset
(Single-Chip
Mode 1, ROMless
Mode 0 or 1)
IDLE Mode/
Software STOP
Mode
HALT Mode/
During DMA
Transfer
Bus Hold
A16 to A23 (PDH0 to PDH7)
Hi-Z
Hi-Z
Hi-Z
Operating
Hi-Z
AD0 to AD15 (PDL0 to PDL15)
Hi-Z
Hi-Z
Hi-Z
Operating
Hi-Z
CS0 to CS7 (PCS0 to PCS7)
Hi-Z
Hi-Z
H
Operating
Hi-Z
LWR, UWR (PCT0, PCT1)
Hi-Z
Hi-Z
H
Operating
Hi-Z
RD (PCT4)
Hi-Z
Hi-Z
H
Operating
Hi-Z
ASTB (PCT6)
Hi-Z
Hi-Z
H
Operating
Hi-Z
WAIT (PCM0)
Hi-Z
Hi-Z
−
Operating
−
CLKOUT (PCM1)
Hi-Z
Operating
L
Operating
Operating
HLDAK (PCM2)
Hi-Z
Hi-Z
H
Operating
L
HLDRQ (PCM3)
Hi-Z
Hi-Z
−
Operating
Operating
Caution
When controlling the external bus using an ASIC or the like in standby mode, provide a separate
controller.
Remark
Hi-Z: High impedance
H:
High-level output
L:
Low-level output
−
:
No input sampling
Содержание V850E/IA1 mPD703116
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