Freescale Semiconductor DSP56366 User Manual
Page 260
DSP56366 Bootstrap Program
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
A-8
Freescale Semiconductor
; future compatability
; HEN = 0 When the HPCR register is modified
; HEN should be cleared
; HAEN = 0 Host acknowledge is disabled
; HREN = 1 Host requests are enabled
; HCSEN = 1 Host chip select input enabled
; HA9EN = 0 (address 9 enable bit has no
; meaning in non-multiplexed bus)
; HA8EN = 0 (address 8 enable bit has no
; meaning non-multiplexed bus)
; HGEN = 0 Host GPIO pins are disabled
bra HC11HOSTLD movep #%0000001000011000,x:M_HPCR ; Configure the following conditions: ; HAP = 0 Negative host acknowledge ; HRP = 0 Negative host request ; HCSP = 0 Negatice chip select input ; HDDS = 0 Single strobe bus (R/W~ and DS) ; HMUX = 0 Non multiplexed bus ; HASP = 0 (address strobe polarity has no ; meaning in non-multiplexed bus) ; HDSP = 1 Negative data stobes polarity ; HROD = 0 Host request is active when enabled ; spare = 0 This bit should be set to 0 for ; future compatability ; HEN = 0 When the HPCR register is modified ; HEN should be cleared ; HAEN = 0 Host acknowledge is disabled ; HREN = 1 Host requests are enabled ; HCSEN = 1 Host chip select input enabled ; HA9EN = 0 (address 9 enable bit has no ; meaning in non-multiplexed bus) ; HA8EN = 0 (address 8 enable bit has no ; meaning in non-multiplexed bus) ; HGEN = 0 Host GPIO pins are disabled bra I8051HOSTLD movep #%0001110000011110,x:M_HPCR ; Configure the following conditions: ; HAP = 0 Negative host acknowledge ; HRP = 0 Negatice host request ; HCSP = 0 Negatice chip select input ; HDDS = 1 Dual strobes bus (RD and WR) ; HMUX = 1 Multiplexed bus ; HASP = 1 Positive address strobe polarity ; HDSP = 0 Negative data stobes polarity