Freescale-semiconductor DSP56366 User Manual Page 337

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Programming Sheets
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor D-29
Figure D-14. SHI Host Control/Status Register
HBUSY I
2
C SPI Mode
0 Stop event Not Busy
1 SHI detects
Start
SS
detected
(Slave)
-OR-
HTX/IOSR not
empty (master)
SHI
*
*
= Reserved, write as 0
15 14 13 12
11 10 9 8 7 6 5 4 3 2 1 0
HRQE0 HFIF0 HM1 HM0 HI
2
CHEN
SHI Control/Status
X:$FFFF91
Reset = $008200
Register (HCSR)
19 18 17 1623 22 21 20
HRFFHROEHBUSY
*
0
HMSTHTIE HBIE HIDLE HRQE1HTDE HTUEHRIE1HRIE0HRNEHBER
HEN Description
0 SHI disabled
1 SHI enabled
HI
2
C Result
0 SPI mode
1I
2
C mode
HM1 HM0 Description
0 0 8 bit data
0 1 16 bit data
1 0 24 bit data
11Reserved
HFIFO Description
0 1 level FIFO
110 level
HMST Result
0Slave mode
1Master
mode
HRQE1 HRQE0 HREQ Pin Operation
0 0 High impedance
0 1 Asserted if IOSR ready to receive new word
1 0 Asserted if IOSR ready to transmit new word
11I
2
C: Asserted if IOSR ready to transmit or receive
SPI: Asserted if OISR ready to transmit and receive
HIDLE Description
0 Bus busy
1 Stop event
HBIE Description
0 Bus Error Interrupt disabled
1 Bus Error Interrupt enabled
HTIE Description
0 Transmit Interrupt disabled
1 Transmit Interrupt activated
Host Transmit Underrun Error
Read Only Status Bit
Host Transfer Data Empty
Read Only Status Bit
Host Receive FIFO Not Empty
Read Only Status Bit
Host Receive FIFO Full
Read Only Status Bit
Host Receive Overrun Error
Read Only Status Bit
*
0
HBER I
2
C SPI Mode
0 No error No error
1 No acknowledge SS
asserted
HRIE1 HRIE0 Interrupt Condition
00
1
0
1
disabled
Receive FIFO not empty
Receive Overrun Error
reserved
Receive FIFO full
Receive Overrun Error
n.a.
HRNE=1 & HROE=0
HROE=1
n.a.
HRFF=1 & HROE=0
HROE=1
0
1
1
*
0
HCKFR
Application:
Date:
Programmer:
HCKFR Description
0 I2C Slave Clock
Freeze Disabled
1 I2C Slave Clock
Freeze Enabled
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