MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 381

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

17.7.4 SPI Status Register
MMC2107 – Rev. 2.0
MOTOROLA
Address: 0x00cb_0003
Reset:
Read: Anytime
Write: Has no meaning or effect
SPIF — SPI Interrupt Flag
WCOL — Write Collision Flag
MODF — Mode Fault Flag
Read:
Write:
The SPIF flag is set after the eighth SCK cycle in a transmission when
received data transfers from the shift register to SPIDR. If the SPIE bit
is also set, SPIF generates an interrupt request. Once SPIF is set, no
new data can be transferred into SPIDR until SPIF is cleared. Clear
SPIF by reading SPISR with SPIF set and then accessing SPIDR.
Reset clears SPIF.
The WCOL flag is set when software writes to SPIDR during a
transmission. Clear WCOL by reading SPISR with WCOL set and
then accessing SPIDR. Reset clears WCOL.
The MODF flag is set when the SS pin of a master SPI is driven low
and the SS pin is configured as a mode-fault input. If the SPIE bit is
also set, MODF generates an interrupt request. A mode fault clears
the SPE, MSTR, and DDRSP[2:0] bits. Clear MODF by reading
SPISR with MODF set and then writing to SPICR1. Reset clears
MODF.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = New data available in SPIDR
0 = No new data available in SPIDR
1 = Write collision
0 = No write collision
1 = Mode fault
0 = No mode fault
Serial Peripheral Interface Module (SPI)
SPIF
Bit 7
0
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Figure 17-5. SPI Status Register (SPISR)
= Writes have no effect and the access terminates without a transfer error exception.
WCOL
6
0
5
0
0
MODF
4
0
Serial Peripheral Interface Module (SPI)
3
0
0
Memory Map and Registers
2
0
0
1
0
0
Technical Data
Bit 0
0
0
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