Setup Example, Fmode, AT1ACT, AT1EN, Btstp

14-4 Setup Example

An example setup procedure, with a description of each step is as follows ;

	Setup Procedure				Description
(1)	Set the data transfer mode.			(1)	Select the data transfer mode with the AT1MD
	AT1CNT0 (x'3FD0')				flag in the AT1CNT0 register.
	bp7	:FMODE			No matter which mode you select, setting the
	bp6	:AT1ACT	= 0		FMODE flag disables the incrementing function
	bp5-2	:AT1MD3-0			in memory pointer 0.
	bp0	:AT1EN	= 0		Normally set this flag to 0.
					Note that you must set the ATC1 enable flag,
					AT1EN, to 0 at this step.
					Only enable ATC1 after setting all the other
					registers.
(2)	Set memory pointer 0.			(2)	Depending on the transfer mode you selected,
	AT1MAP0L (x'3FD3')				set the source or destination address in the
	AT1MAP0M (x'3FD4')				AT1MAP0 registers.
	AT1MAP0H (x'3FD5')
(3)	Set memory pointer 1.			(3)	Depending on the transfer mode you selected,
	AT1MAP1L (x'3FD6')				set the source or destination address in the
	AT1MAP1M (x'3FD7')				AT1MAP1 registers.
	AT1MAP1H (x'3FD8')
(4)	Set the transfer data counter.			(4)	Set the ATC1 data transfer count in the
	AT1TRC (x'3FD2')				AT1TRC register.
(5)	Select the ATC1 activation factor.			(5)	Select the ATC1 activation factor with the
	AT1CNT1 (x'3FD1')				AT1IR flag in the AT1CNT1 register. If you
	bp4	:BTSTP			select a burst-type transfer mode, then you
	bp3-0	:AT1IR3-0			must also enable or disable ATC1 shutdown at
					this step, by setting the BTSTP.
(6)	Enable ATC operation.			(6)	Enable ATC1 data transfers with the AT1EN flag
	AT1CNT0 (x'3FD0')				in the AT1CNT0 register.
	bp0	:AT1EN	= 1

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Setup Example