ST92F124R9TB STMicroelectronics, ST92F124R9TB Datasheet - Page 254
![IC MCU 8BIT 64K MEMORY 64-LQFP](/photos/12/15/121504/stmicroelectronics-64-lqfp_sml.jpg)
ST92F124R9TB
Manufacturer Part Number
ST92F124R9TB
Description
IC MCU 8BIT 64K MEMORY 64-LQFP
Manufacturer
STMicroelectronics
Series
ST9r
Datasheet
1.ST92F150CV1TB.pdf
(429 pages)
Specifications of ST92F124R9TB
Core Processor
ST9
Core Size
8/16-Bit
Speed
24MHz
Connectivity
I²C, SCI, SPI
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
48
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
64-LQFP
Processor Series
ST92F12x
Core
ST9
Data Bus Width
8 bit, 16 bit
Data Ram Size
6 KB
Interface Type
CAN, I2C, SCI, SPI
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
80
Number Of Timers
16 bit
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Development Tools By Supplier
ST92F150-EPB
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST92F124R9TB
Manufacturer:
STMicroelectronics
Quantity:
10 000
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SERIAL PERIPHERAL INTERFACE (SPI)
SERIAL PERIPHERAL INTERFACE (Cont’d)
10.7.4.3 Data Transfer Format
During an SPI transfer, data is simultaneously
transmitted (shifted out serially) and received
(shifted in serially). The serial clock is used to syn-
chronize the data transfer during a sequence of
eight clock pulses.
The SS pin allows individual selection of a slave
device; the other slave devices that are not select-
ed do not interfere with the SPI transfer.
Clock Phase and Clock Polarity
Four possible timing relationships may be chosen
by software, using the CPOL and CPHA bits.
The CPOL (clock polarity) bit controls the steady
state value of the clock when no data is being
transferred. This bit affects both master and slave
modes.
The combination between the CPOL and CPHA
(clock phase) bits selects the data capture clock
edge.
Figure 123
combinations of the CPHA and CPOL bits. The di-
agram may be interpreted as a master or slave
timing diagram where the SCK pin, the MISO pin,
the MOSI pin are directly connected between the
master and the slave device.
The SS pin is the slave device select input and can
be driven by the master device.
Figure 122. CPHA / SS Timing Diagram
254/429
9
MOSI/MISO
Master SS
(CPHA=0)
(CPHA=1)
Slave SS
Slave SS
shows an SPI transfer with the four
Byte 1
The master device applies data to its MOSI pin-
clock edge before the capture clock edge.
CPHA Bit is Set
The second edge on the SCK pin (falling edge if
the CPOL bit is reset, rising edge if the CPOL bit is
set) is the MSBit capture strobe. Data is latched on
the occurrence of the first clock transition.
No write collision should occur even if the SS pin
stays low during a transfer of several bytes (see
Figure
CPHA Bit is Reset
The first edge on the SCK pin (falling edge if CPOL
bit is set, rising edge if CPOL bit is reset) is the
MSBit capture strobe. Data is latched on the oc-
currence of the second clock transition.
This pin must be toggled high and low between
each byte transmitted (see
To protect the transmission from a write collision a
low value on the SS pin of a slave device freezes
the data in its SPDR register and does not allow it
to be altered. Therefore the SS pin must be high to
write a new data byte in the SPDR without produc-
ing a write collision.
Byte 2
122).
Byte 3
Figure
122).
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