MC68HC11F1CFN4 Freescale Semiconductor, MC68HC11F1CFN4 Datasheet - Page 49

• Manufacturer Part Number: MC68HC11F1CFN4
• Description: IC MCU 512 EEPROM 4MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11F1CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 30
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

10 Serial Peripheral Interface
10.1 SPI Block Diagram
MC68HC11F1/FC0
MC68HC11FTS/D
The serial peripheral interface (SPI) allows the MCU to communicate synchronously with peripheral de-
vices and other microprocessors. The SPI protocol facilitates rapid exchange of serial data between de-
vices in a control system. The MC68HC11F1 and MC68HC11FC0 can be set up for master or slave
operation. Standard data rates can be as high as one half of the E-clock rate when configured as mas-
ter, and as fast as the E-clock when configured as slave.
The MC68HC11FC0 has an additional control bit that allows the SPI baud rate counter to be bypassed.
This allows a master mode baud rate equal to the E-clock frequency.
MCU CLOCK
INTERNAL
PRESENT ON MC68HC11FC0 ONLY
DOTTED LINE CONNECTIONS
SPIE
SPE
DWOM
MSTR
CPHA
CPOL
SPR1
SPR0
SPRBYP
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Figure 12 SPI Block Diagram
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SPR0
SPR1
SPI STATUS REGISTER
MSB
8-BIT SHIFT REGISTER
READ DATA BUFFER
CLOCK LOGIC
MSTR
SPIE
SPE
CONTROL
SPI
LSB
SPI INTERRUPT
M
M
S
S
M
S
REQUEST
MOSI
MISO
SCK
PD5
PD4
PD3
PD2
SS
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