Topic       : MC56001 Documentation
Author      : JAY Software
Version     : 1.0 (19/11/1997)
Subject     : Programming/Assembler
Nodes       : 152
Index Size  : 4106
HCP-Version : 4
Compiled on : Atari
@charset    : atarist
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@help       : 
@options    : -i +y +z -t4
@width      : 100
View Ref-FileHOST RECEIVE DATA REGISTER (HRX):
    The HRX register is used for host-to-DSP data transfers.The HRX register
is viewed as a 24-bit read-only register by the DSP CPU. The HRX register is
loaded with 24-bit data from the transmit data registers (TXH:TXM:TXL) on
the host processor side when both the transmit data register empty TXDE on
the host processor side and DSP host receive data full (HRDF) bits are
cleared. This transfer operations sets TXDE and HRDF. The HRX register
contains valid data when the HRDF bit is set. Reading HRX clears HRDF. The
DSP may program the HRIE bit to cause a host receive data interrupt when
HRDF is set. Resets do not affect HRX.