MODULE camvme

title 'VME interface'

declarations

"logic levels
	H,L,X,VCC,GND = 1,0,.X.,1,0;

"input pins ---------------------------------------------------------------------
	A1,A2,A3,A4,A5,A6,A7			pin;	"address
	A8					pin;	"for CAM distinction
	AM0,AM1,AM2,AM3,AM4,AM5			pin;	"address modifiers
	WRITE					pin;	"write/read
	SYSRES					pin;	"system reset
	IACK					pin;	"interrupt acknowledge
	MS0,MS1					pin;	"address16-23match,24-31match
	AS,DS0,DS1				pin;	"strobes
	DLAY1,DLAY2,DLAY3,DLAY4,DLAY5		pin;	"50,100,150,200,250nsec delayed DELAYIN
	LWORD					pin;	"for Long word
	SH0,SH1,IPOP0,IPOP1,OPIP0,OPIP1		pin;	"for CAM LSI
	FLO0,FLO1,PO0,PO1,HO0,HO1			pin;	"for CAM LSI

"output pins --------------------------------------------------------------------
	BDTACK					pin;	"Data Acknowledge
	BBERR					pin;	"Bus Error
	DELAYIN					pin;	"to Active Delay Input
	SS1					pin;	"for 74LS645
"	RSTAT,WCTRL,CLKSL,PROGX,TDITM		pin;	for XC95108PQ160 programming
	IRQ1					pin;	"for Interrupt ?
	ADD0,ADD1,ADD2,ADD3,ADD4,ADD5,ADD6,ADD7	pin;	"for CAM Address
	WR,SQRST,OPNS0,OPNS1,RD		pin;	"for CAM Control

"clock out ----------------------------------------------------------------------

"vector definitions
	AMCODE = [AM5,AM4,AM3,AM2,AM1,AM0];
	ADDR   = [A7,A6,A5,A4,A3,A2,A1,X];

"internal nodes (pins also)
	U24,S24,U32,S32				node;	"AM code
	SELECT					pin;	"Module Selected
	CLKSL					pin;	"for test
	RST					pin;	"for CAM LSI
	RS,WS					pin;	"r/w strobes

"end of declarations

equations

"address
	SELECT = ((S32 # U32) & !MS0 & !MS1 # (S24 # U24) & !MS0) & !AS & IACK;

"address modifier
	S24 = (AMCODE==^h3E)#(AMCODE==^h3D);
	U24 = (AMCODE==^h3A)#(AMCODE==^h39);
	S32 = (AMCODE==^h0E)#(AMCODE==^h0D);
	U32 = (AMCODE==^h0A)#(AMCODE==^h09);

"data strobe
	RS = WRITE & SELECT & (!DS0 # !DS1);
	WS = !WRITE & SELECT & (!DS0 # !DS1);

"250ns active delay
	DELAYIN = !DS0 # !DS1;
"data acknowledge / bus error
	BDTACK = !WRITE & SELECT & DLAY3 & (!DS0 # !DS1) # WRITE & SELECT & DLAY3 & (!DS0 # !DS1);
	BBERR = GND;

"74LS645
	SS1 = GND;	"enabled
"	DIR = RS;		1 for read operation

"system reset
"	SYSRES = ;

"address asignment
"256bit VME address space
"	RSTAT = SELECT & (ADDR == ^H00);
"	WCTRL = SELECT & (ADDR == ^H04);
	CLKSL = SELECT & (ADDR == ^H08);
"	PROGX = SELECT & (ADDR == ^H0C);
"	TDITM = SELECT & (ADDR == ^H10);

"i.e
"	0x00	READ STATUS REGISTER
"		[bit0=PCLOCKSEL,bit1=LEDENABLE,bit2=PROGENABLE,
"		 bit3=TDO,bit4=TDI,bit5=TMS,bit6=GND,bit7=VCC]
"	0x04	WRITE CONTROL REGISTER [Not Used]
"	0x08	SELECT CLOCK / LED CONTROL
"		[bit0(1:external 0:internal),
"		 bit1(1:enable LEDs 0:disable LEDs)]
"	0x0C	PROGRAM XILINX FROM VME enable[bit0 1=enable]
"	0x10	WRITE TMS[bit0] AND TDI[bit1]
"
"	0x14	REGISTER ADDRESS
"		[bit0-bit3:register address,bit4:LOADREGADDR]
"	0x18	SEQUENSER CONTROL
"		[bit0:AUTOSTOP,bit1:CLKSTART,bit2:CLRREGADDR]

"CAM LSI Control
	RST = SELECT & (ADDR == ^HB0) & !DS1;

"CAM LSI Address
	ADD0 = SELECT & !DS0;
	ADD1 = SELECT & A1;
	ADD2 = SELECT & A2;
	ADD3 = SELECT & A3;
	ADD4 = SELECT & A4;
	ADD5 = SELECT & A5;
	ADD6 = SELECT & A6;
	ADD7 = SELECT & A7;
"Others
	IRQ1 = GND;
"	LWORD = GND;
"	SH0 = GND;
"	SH1 = GND;
"	IPOP0 = GND;
"	IPOP1 = GND;
"	OPIP0 = GND;
"	OPIP1 = GND;
	OPNS0 = GND;
	OPNS1 = GND;
	RD = GND;
"	FLO0 = GND;
"	FLO1 = GND;
"	PO0 = GND;
"	PO1 = GND;
"	HO0 = GND;
"	HO1 = GND;
	WR = GND;
	!SQRST = VCC;

"end of equations

"test vectors

"end of test vectors

END camvme