CHAPTER 2 PIN FUNCTIONS
46
User’s Manual U14359EJ4V0UM
2.2
Pin Status
The status of each pin after reset, in power-save mode (software STOP, IDLE, HALT modes), and during DMA
transfer, refresh, and bus hold (TH) is shown below.
Operating Status
Pin
Reset
(Single-Chip Mode 0)
Reset
(Single-Chip Mode 1,
ROMless Mode 0,1)
IDLE Mode/Software
STOP Mode
HALT Mode/During
DMA Transfer,
Refresh
Bus Hold
(TH)
A0 to A15 (PAL0 to PAL15)
Hi-Z
Hi-Z
Hi-Z
Operating
Hi-Z
A16 to A25 (PAH0 to PAH9)
Hi-Z
Hi-Z
Hi-Z
Operating
Hi-Z
D0 to D15 (PDL0 to PDL15)
Hi-Z
Hi-Z
Hi-Z
Operating
Hi-Z
CS0 to CS7 (PCS0 to PCS7)
Hi-Z
Hi-Z
SELF
Operating
Hi-Z
RAS1, RAS3, RAS4, RAS6
(PCS1, PCS3, PCS4, PCS6)
−
−
CBR
Operating
Hi-Z
IOWR (PCS2)
−
−
H
Operating
Hi-Z
IORD (PCS5)
−
−
H
Operating
Hi-Z
LWR, UWR (PCT0, PCT1)
Hi-Z
Hi-Z
H
Operating
Hi-Z
LCAS,
UCAS (PCT0, PCT1)
−
−
CBR
Operating
Hi-Z
LDQM, UDQM (PCT0, PCT1)
−
−
H
Operating
Hi-Z
RD (PCT4)
Hi-Z
Hi-Z
H
Operating
Hi-Z
WE (PCT5)
Hi-Z
Hi-Z
H
Operating
Hi-Z
OE (PCT6)
Hi-Z
Hi-Z
H
Operating
Hi-Z
BCYST (PCT7)
Hi-Z
Hi-Z
H
Operating
Hi-Z
WAIT (PCM0)
Hi-Z
Hi-Z
−
Operating
−
CLKOUT (PCM1)
Hi-Z
Operating
L
Operating
Operating
BUSCLK (PCM1)
−
−
L
Operating
Operating
HLDAK (PCM2)
Hi-Z
Hi-Z
H
Operating
L
HLDRQ (PCM3)
Hi-Z
Hi-Z
−
Operating
Operating
REFRQ (PCM4)
Hi-Z
Hi-Z
CBR
Operating
Operating
SELFREF (PCM5)
Hi-Z
Hi-Z
−
Operating
−
SDCKE (PCD0)
Hi-Z
Hi-Z
L
Operating
Operating
SDCLK (PCD1)
Hi-Z
Hi-Z
L
Operating
Operating
SDCAS (PCD2)
−
−
SELF
Operating
Hi-Z
LBE (PCD2)
Hi-Z
Hi-Z
H
Operating
Hi-Z
SDRAS (PCD3)
−
−
SELF
Operating
Hi-Z
UBE (PCD3)
Hi-Z
Hi-Z
H
Operating
Hi-Z
DMAAK0 to DMAAK3
(PBD0 to PBD3)
Hi-Z
Hi-Z
H
Operating
H
Remark
Hi-Z:
High-impedance
Hold:
Status during immediately preceding external bus cycle hold
H:
High-level output
L:
Low-level output
−
:
No sampling of input
CBR:
A DRAM refresh state
SELF:
Self-refresh state when pins are connected to SDRAM