XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 295
XC908AS60ACFU
Manufacturer Part Number
XC908AS60ACFU
Description
MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
Manufacturer
Motorola Semiconductor Products
Datasheet
1.XC908AS60ACFU.pdf
(576 pages)
- Current page: 295 of 576
- Download datasheet (4Mb)
19.6.4 Transmission Initiation Latency
MC68HC908AZ60A — Rev 2.0
MOTOROLA
When the SPI is configured as a master (SPMSTR = 1), transmissions
are started by a software write to the SPDR ($0012). CPHA has no effect
on the delay to the start of the transmission, but it does affect the initial
state of the SCK signal. When CPHA = 0, the SCK signal remains
inactive for the first half of the first SCK cycle. When CPHA = 1, the first
SCK cycle begins with an edge on the SCK line from its inactive to its
active level. The SPI clock rate (selected by SPR1–SPR0) affects the
delay from the write to SPDR and the start of the SPI transmission. (See
Figure
derivative of the internal MCU clock. It is only enabled when both the
SPE and SPMSTR bits (SPCR) are set to conserve power. SCK edges
occur half way through the low time of the internal MCU clock. Since the
SPI clock is free-running, it is uncertain where the write to the SPDR will
occur relative to the slower SCK. This uncertainty causes the variation
in the initiation delay shown in
than a single SPI bit time. That is, the maximum delay between the write
to SPDR and the start of the SPI transmission is two MCU bus cycles for
DIV2, eight MCU bus cycles for DIV8, 32 MCU bus cycles for DIV32, and
128 MCU bus cycles for DIV128.
19-5). The internal SPI clock in the master is a free-running
Serial Peripheral Interface (SPI)
Figure
19-5. This delay will be no longer
Serial Peripheral Interface (SPI)
Transmission Formats
Technical Data
295
Related parts for XC908AS60ACFU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Triacs
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Triacs
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
6367254 Motorola SC (xstrs/r F)
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
50 Amperes NPN Silicon Power Darlington Transistor 850 Volts 250 Watts
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
M68HC12B Family Data Sheet
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
DUAL GATE Mosfet VHF Amplifier
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
DUAL GATE Mosfet VHF Amplifier
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
NPN Darlington Silicon Power Transistor 10 Amperes 80 Volts 20 Watts
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Integrated Circuits
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Low Skew CMOS Clock Driver
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Low Skew CMOS Clock Driver With Reset
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Low-cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC
Manufacturer:
Motorola Semiconductor Products
Datasheet:
Part Number:
Description:
Fast Recovery Power Rectifiers
Manufacturer:
Motorola Semiconductor Products
Datasheet: