MC68HC16Z1CEH16 Freescale Semiconductor, MC68HC16Z1CEH16 Datasheet - Page 248

• Manufacturer Part Number: MC68HC16Z1CEH16
• Description: IC MCU 16BIT 16MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: HC16r

Specifications of MC68HC16Z1CEH16

• Core Processor: CPU16
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Processor Series: HC16Z
• Core: CPU16
• Data Bus Width: 16 bit
• Controller Family/series: 68HC16
• No. Of I/o's: 26
• Ram Memory Size: 1KB
• Cpu Speed: 16MHz
• No. Of Timers: 2
• Embedded Interface Type: QSPI, SCI
• Rohs Compliant: Yes
• Package: 132PQFP
• Family Name: HC16
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3|5 V
• Number Of Programmable I/os: 16
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 11
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI, UART
• Maximum Clock Frequency: 16 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

10.3.3.2 Slave Mode
10.3.4 SPI Clock Phase and Polarity Controls
10-8
Data transfer is synchronized with the internally-generated serial clock (SCK). Control
bits CPHA and CPOL in SPCR control clock phase and polarity. Combinations of
CPHA and CPOL determine the SCK edge on which the master MCU drives outgoing
data from the MOSI pin and latches incoming data from the MISO pin.
Clearing the MSTR bit in SPCR selects slave mode operation. In slave mode, the SPI
is unable to initiate serial transfers. Transfers are initiated by an external bus master.
Slave mode is typically used on a multimaster SPI bus. Only one device can be bus
master (operate in master mode) at any given time.
When using the SPI in slave mode, include the following steps:
When SPE is set and MSTR is clear, a low state on the SS pin initiates slave mode
operation. The SS pin is used only as an input.
After a byte or word of data is transmitted, the SPI sets the SPIF flag. If the SPIE bit in
SPCR is set, an interrupt request is generated when SPIF is asserted.
Transfer is synchronized with the externally generated SCK. The CPHA and CPOL
bits determine the SCK edge on which the slave MCU latches incoming data from the
MOSI pin and drives outgoing data from the MISO pin.
Two bits in the SPCR determine SCK phase and polarity. The clock polarity (CPOL)
bit selects clock polarity (high true or low true clock). The clock phase control bit
(CPHA) selects one of two transfer formats and affects the timing of the transfer. The
clock phase and polarity should be the same for the master and slave devices. In some
cases, the phase and polarity may be changed between transfers to allow a master
device to communicate with slave devices with different requirements. The flexibility
of the SPI system allows it to be directly interfaced to almost any existing synchronous
serial peripheral.
1. Write to the MMCR and interrupt registers. Refer to
2. Write to the MPAR to assign the following pins to the SPI: MISO, MOSI, and
3. Write to the MDDR to direct the data flow on SPI pins. Configure the SCK,
4. Write to the SPCR to assign values for CPHA, CPOL, SIZE, LSBF, WOMP, and
more information.
SS. MISO is used for serial data output in slave mode, and MOSI is used for
serial data input. Either or both may be necessary, depending on the particular
application. SCK is the input serial clock. SS selects the SPI when asserted.
MOSI, and SS pins as inputs. Configure MISO as an output.
SPIE. Set the MSTR bit to select master operation. Set the SPE bit to enable
the SPI. (The BAUD field in the SPCR of the slave device has no effect on SPI
operation.)
MULTICHANNEL COMMUNICATION INTERFACE
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10.5 MCCI Initialization
M68HC16 Z SERIES
USER’S MANUAL
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