MAS3587F datasheet(31/82 Pages) MICRONAS

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ADVANCE INFORMATION

MAS 3587F

Micronas

3.3.1.14. Fast Program Download

The Fast Program Download command introduces a data transfer via the parallel port. n = n2,n1,n0 denotes the

number of 20-bit data words to be transferred, a = a3,a2,a1,a0 gives the start address. The data at the PIO port

must be padded with three 0-nibbles to get multiples of 16 bits.

The download must be initiated in the following sequence:

– Issue Freeze command

– Stop all DMA transfers

– Issue Fast Program Download command

– Download code via PIO interface

– Switch appropriate memory area to act as program RAM (register EDhex)

– Issue Run command to start program execution at entry point of downloaded code

Example for Fast Program Download command:

Download 4 words starting at D0:1400:

(stop all data transfers)

)UHH]H

<DW 68 60 04

initiate download of 4 words

10 00>

start at address D0:1000

Now transfer 8-bit words via the parallel PIO port:

0,0

0,d4

d3,d2

d1,d0

0,0

0,d4

d3,d2

d1,d0

0,0

0,d4

d3,d2

d1,d0

0,0

0,d4

d3,d2

d1,d0

reconfigure memory from

D0:1000 to D0:17ff

start program execution at

address D0:1000

3.3.1.15. Serial Program Download

Program downloads may also be performed via the I2C interface by using the Write D0/1 Memory commands. A sim-

ilar command sequence as in the Fast Program Download (stop transfers, Freeze...) applies.

$69

6,n2

n1,n0

a3,a2

a1,a0

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