MC9S12XDT512CAA Freescale, MC9S12XDT512CAA Datasheet - Page 534
MC9S12XDT512CAA
Manufacturer Part Number
MC9S12XDT512CAA
Description
Manufacturer
Freescale
Datasheet
1.MC9S12XDT512CAA.pdf
(1348 pages)
Specifications of MC9S12XDT512CAA
Cpu Family
HCS12
Device Core Size
16b
Frequency (max)
40MHz
Interface Type
CAN/I2C/SCI/SPI
Total Internal Ram Size
32KB
# I/os (max)
59
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
2.5/5V
Operating Supply Voltage (max)
2.75/5.5V
Operating Supply Voltage (min)
2.35/3.15V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Package Type
PQFP
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12XDT512CAA
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Part Number:
MC9S12XDT512CAAR
Manufacturer:
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Chapter 12 Serial Peripheral Interface (S12SPIV4)
The SS line can remain active low between successive transfers (can be tied low at all times). This format
is sometimes preferred in systems having a single fixed master and a single slave that drive the MISO data
line.
The SPI interrupt request flag (SPIF) is common to both the master and slave modes. SPIF gets set one
half SCK cycle after the last SCK edge.
534
•
End of Idle State
SCK Edge Number
SCK (CPOL = 0)
SCK (CPOL = 1)
SAMPLE I
MOSI/MISO
CHANGE O
CHANGE O
SEL SS (O)
Master only
SEL SS (I)
MOSI pin
MISO pin
Back-to-back transfers in master mode
In master mode, if a transmission has completed and a new data byte is available in the SPI data
register, this byte is sent out immediately without a trailing and minimum idle time.
MSB first (LSBFE = 0):
t
t
t
LSB first (LSBFE = 1):
L
T
I
= Minimum idling time between transfers (minimum SS high time), not required for back-to-back transfers
= Minimum leading time before the first SCK edge, not required for back-to-back transfers
= Minimum trailing time after the last SCK edge
t
L
1
MSB
LSB
2
Figure 12-12. SPI Clock Format 1 (CPHA = 1)
3
Begin
Bit 6
Bit 1
4
MC9S12XDP512 Data Sheet, Rev. 2.21
5
Bit 5
Bit 2
6
7
Bit 4
Bit 3
8
Transfer
9
Bit 3
Bit 4
10
11
Bit 2
Bit 5
12
13 14
Bit 1
Bit 6
End
15
MSB
LSB
16
t
T
Minimum 1/2 SCK
Freescale Semiconductor
Begin of Idle State
t
I
for t
T
t
L
, t
l
, t
L
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