Figure419 hi initialization—dsp side, Figure 4-19, Hi initialization—dsp side -43 – Motorola DSP56012 User Manual
Page 123: Figure 4-19 hi initialization — dsp side
Parallel Host Interface
Host Interface (HI)
MOTOROLA
DSP56012 User’s Manual
4-43
Figure 4-19 HI Initialization—DSP Side
X:$FFE8
Host Control Register (HCR)
(Read/Write)
6.Select Port B For HI Port Operation:
X:$FFEC
Reserved; write as 0.
Note:
1.
The host flags are general-purpose semaphores. They are not required for host
port operation but can be used in some applications.
STEP 1 of HI Port Configuration
1.Enable/Disable
Host Receive Data Full Interrupt
Enable Interrupt:Bit 0 = 1
Disable Interrupt:Bit 0 = 0
2.Enable/Disable
Host Transmit Data Empty Interrupt
Enable Interrupt: Bit 1 = 1
Disable Interrupt: Bit 1 = 0
3.Enable/Disable
Host Command Pending Interrupt
Enable Interrupt: Bit 2 = 1
Disable Interrupt: Bit 2 = 0
4.Set/Clear
Host Flag 2 (Optional)
Enable Flag: Bit 3 = 1
Disable Flag: Bit 3 = 0
5.Set/Clear
Host Flag 3 (Optional)
Enable Flag: Bit 4 = 1
Disable Flag: Bit 4 = 0
HF3
HF2 HCIE HTIE HRIE
7
0
BC
1
BC
0
15
0
6
5
4
3
2
1
AA0327