NEC V850E/MA1 User Manual page 44

Pin Name I/O
LCAS Output
UCAS Output
LWR Output
UWR Output
LDQM Output
UDQM Output
RD Output
WE Output
OE Output
BCYST Output
CS0 Output
CS1
CS2
CS3
CS4
CS5
CS6
CS7
RAS1 Output
RAS3
RAS4
RAS6
IOWR Output
IORD Output
SDCKE Output
SDCLK Output
SDCAS Output
SDRAS Output
LBE Output
UBE Output
D0 to D15 I/O
A0 to A15 Output
A16 to A25
RESET Input
X1 Input
−
X2
CLKOUT Output
BUSCLK Output
44
CHAPTER 2 PIN FUNCTIONS
Column address strobe signal output for DRAM lower data
Column address strobe signal output for DRAM higher data
External data lower byte write strobe signal output
External data higher byte write strobe signal output
Output disable/write mask signal output for SDRAM lower data
Output disable/write mask signal output for SDRAM higher data
External data bus read strobe signal output
Write enable signal output for DRAM
Output enable signal output for DRAM
Strobe signal output that shows the start of the bus cycle
Chip select signal output
Row address strobe signal output for DRAM
DMA write strobe signal output
DMA read strobe signal output
SDRAM clock enable signal output
SDRAM clock signal output
Column address strobe signal output for SDRAM
Row address strobe signal output for SDRAM
External data bus lower byte enable signal output
External data bus higher byte enable signal output
16-bit data bus for external memory
26-bit address bus for external memory
System reset input
Connects the crystal resonator for system clock oscillation. In the
case of an external source supplying the clock, it is input to X1.
System clock output
Bus clock output
User's Manual U14359EJ4V0UM
Function
(3/4)
Alternate Function
PCT0/LWR/LDQM
PCT1/UWR/UDQM
PCT0/LCAS/LDQM
PCT1/UCAS/UDQM
PCT0/LCAS/LWR
PCT1/UCAS/UWR
PCT4
PCT5
PCT6
PCT7
PCS0
PCS1/RAS1
PCS2/IOWR
PCS3/RAS3
PCS4/RAS4
PCS5/IORD
PCS6/RAS6
PCS7
PCS1/CS1
PCS3/CS3
PCS4/CS4
PCS6/CS6
PCS2/CS2
PCS5/CS5
PCD0
PCD1
PCD2/LBE
PCD3/UBE
PCD2/SDCAS
PCD3/SDRAS
PDL0 to PDL15
PAL0 to PAL15
PAH0 to PAH9
−
−
−
PCM1/BUSCLK
PCM1/CLKOUT