AN2007 Motorola / Freescale Semiconductor, AN2007 Datasheet - Page 14

• Manufacturer Part Number: AN2007
• Description: Evaluating ColdFire in a 68K Target System: MC68340 Gateway Reference Design
• Manufacturer: Motorola / Freescale Semiconductor

EQUATIONS
COUNT0 := (CS0_OFF + CS1) * /RESET
COUNT1 := COUNT0
DTACK = (CS0_OFF + CS1) * (COUNT1 + (DSACK0 * /DSACK1) + (/DSACK0 * DSACK1) *
/RESET)
F_OE = /WR * CS0_ON * /BY * /RESET; FLASH output enable signal.
F_RESET = RESET * /BY
F_WE = CS0_ON * WR * /BY * /RESET; FLASH write enable signal.
;----------------------------------- Simulation Segment ------------
SIMULATION
TRACE_ON F_OE F_WE F_RESET CS0_ON WR BY RESET DTACK CS1 CS0_OFF COUNT0 COUNT1
SETF
CLOCKF CLK
CLOCKF CLK
CLOCKF CLK
CLOCKF CLK
SETF CS1
SETF /CS1
SETF CS1
CLOCKF CLK
CLOCKF CLK
CLOCKF CLK
CLOCKF CLK
SETF /CS1
APPENDIX B PALASM Control Equations for PAL U9
14
/RESET /CS1 /CS0_OFF
; 2 wait states for CS0 and 1
; FLASH reset signal.
MC68340 Gateway Reference Design