Recommended Connection Of Unused Pins And I/O Circuit Types - NEC VR4181 mPD30181 User Manual

2.4 Recommended Connection of Unused Pins and I/O Circuit Types

Pin Name
ADD(21:0)
DATA(15:0)
MEMRD#
MEMWR#
SDCS(1:0)#/RAS(1:0)#
UDQM/UCAS#
LDQM/LCAS#
CAS#
SDRAS#
SDCLK
CLKEN
SYSDIR
SYSEN#
IORD#/GPIO16
IOWR#/GPIO17
IORDY/GPIO18
IOCS16#/GPIO19
UBE#/GPIO20/M
RESET#/GPIO21
ROMCS(2:0)#/GPIO(24:22)
ROMCS3#
SHCLK/LCDCS#
LOCLK/MEMCS16#
FLM/MIPS16EN
FPD(3:0)
VPLCD/VPGPIO1
VPBIAS/VPGPIO0
POWER
RTCRST#
RSTSW#
POWERON
MPOWER
BATTINH/BATTINT#
TPX(1:0)
TPY(1:0)
Remark No specification (−) in the Recommended Connection When Not Used column indicates that the pin is
always connected.
CHAPTER 2 PIN FUNCTIONS
Recommended Connection When Not Used
−
−
−
−
−
−
−
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
Connect to VDD_IO or GND_IO via resistor
−
Leave open
Leave open
Connect to VDD_IO or GND_IO via resistor
Leave open
Leave open
Leave open
Connect to GND_IO via resistor
−
−
Leave open
−
−
−
−
User's Manual U14272EJ3V0UM
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I/O Circuit Type
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
B
C
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