REGISTER SUMMARY
M68HC16 Z SERIES
D-66
USER’S MANUAL
MODF — Mode Fault Flag
0 = Normal operation.
1 = Another SPI node requested to become the network SPI master while the SPI
was enabled in master mode (SS input taken low).
The SPI asserts MODF when the SPI is in master mode (MSTR = 1) and the SS input
pin is negated by an external driver.
D.7.15 SPI Data Register
UPPB — Upper Byte
In 16-bit transfer mode, the upper byte contains the most significant eight bits of the
transmitted or received data. Bit 15 of the SPDR is the MSB of the 16-bit data.
LOWB — Lower Byte
In 8-bit transfer mode, the lower byte contains the transmitted or received data. MSB
in 8-bit transfer mode is bit 7 of the SPDR. In 16-bit transfer mode, the lower byte holds
the least significant eight bits of the data.
SPDR — SPI Data Register
$YFFC3E
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
UPPB[7:0]
LOWB[7:0]
RESET:
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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