MC9S08AC48MFDE Freescale Semiconductor, MC9S08AC48MFDE Datasheet - Page 238
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MC9S08AC48MFDE
Manufacturer Part Number
MC9S08AC48MFDE
Description
MCU 8BIT 48K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08AC60CFJE.pdf
(348 pages)
Specifications of MC9S08AC48MFDE
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-QFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Chapter 14 Serial Peripheral Interface (S08SPIV3)
The most common uses of the SPI system include connecting simple shift registers for adding input or
output ports or connecting small peripheral devices such as serial A/D or D/A converters. Although
Figure 14-2
simpler connections where data is unidirectionally transferred from the master MCU to a slave or from a
slave to the master MCU.
14.1.2.2
Figure 14-3
Data is written to the double-buffered transmitter (write to SPID) and gets transferred to the SPI shift
register at the start of a data transfer. After shifting in a byte of data, the data is transferred into the
double-buffered receiver where it can be read (read from SPID). Pin multiplexing logic controls
connections between MCU pins and the SPI module.
When the SPI is configured as a master, the clock output is routed to the SPSCK pin, the shifter output is
routed to MOSI, and the shifter input is routed from the MISO pin.
When the SPI is configured as a slave, the SPSCK pin is routed to the clock input of the SPI, the shifter
output is routed to MISO, and the shifter input is routed from the MOSI pin.
In the external SPI system, simply connect all SPSCK pins to each other, all MISO pins together, and all
MOSI pins together. Peripheral devices often use slightly different names for these pins.
238
shows a system where data is exchanged between two MCUs, many practical systems involve
is a block diagram of the SPI module. The central element of the SPI is the SPI shift register.
SPI Module Block Diagram
MC9S08AC60 Series Data Sheet, Rev. 2
Freescale Semiconductor
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