MC68HC711E20CFN3 Freescale Semiconductor, MC68HC711E20CFN3 Datasheet - Page 121
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MC68HC711E20CFN3
Manufacturer Part Number
MC68HC711E20CFN3
Description
IC MCU 3MHZ 20K OTP 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC11r
Specifications of MC68HC711E20CFN3
Core Processor
HC11
Core Size
8-Bit
Speed
3MHz
Connectivity
SCI, SPI
Peripherals
POR, WDT
Number Of I /o
38
Program Memory Size
20KB (20K x 8)
Program Memory Type
OTP
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC711E20CFN3
Manufacturer:
FREESCALE
Quantity:
4 463
Company:
Part Number:
MC68HC711E20CFN3
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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8.5 SPI Signals
This subsection contains descriptions of the four SPI signals:
Any SPI output line must have its corresponding data direction bit in DDRD register set. If the DDR bit is
clear, that line is disconnected from the SPI logic and becomes a general-purpose input. All SPI input lines
are forced to act as inputs regardless of the state of the corresponding DDR bits in DDRD register.
8.5.1 Master In/Slave Out
MISO is one of two unidirectional serial data signals. It is an input to a master device and an output from
a slave device. The MISO line of a slave device is placed in the high-impedance state if the slave device
is not selected.
8.5.2 Master Out/Slave In
The MOSI line is the second of the two unidirectional serial data signals. It is an output from a master
device and an input to a slave device. The master device places data on the MOSI line a half-cycle before
the clock edge that the slave device uses to latch the data.
Freescale Semiconductor
1. SS ASSERTED
2. MASTER WRITES TO SPDR
3. FIRST SCK EDGE
4. SPIF SET
5. SS NEGATED
•
•
•
•
(CPHA = 0)
(CPHA = 1)
Master in/slave out (MISO)
Master out/slave in (MOSI)
Serial clock (SCK)
Slave select (SS)
SAMPLE INPUT
SAMPLE INPUT
SCK (CPOL = 0)
SCK (CPOL = 1)
SS (TO SLAVE)
SCK CYCLE #
DATA OUT
DATA OUT
1
2
MSB
3
MSB
1
M68HC11E Family Data Sheet, Rev. 5.1
Figure 8-2. SPI Transfer Format
6
2
6
SLAVE CPHA = 1 TRANSFER IN PROGRESS
SLAVE CPHA = 0 TRANSFER IN PROGRESS
5
MASTER TRANSFER IN PROGRESS
3
5
4
4
4
3
5
3
2
6
2
1
7
1
LSB
8
LSB
4
SPI Signals
5
121
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