S912XEP768J5MAGR Freescale Semiconductor, S912XEP768J5MAGR Datasheet - Page 768
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S912XEP768J5MAGR
Manufacturer Part Number
S912XEP768J5MAGR
Description
16-bit Microcontrollers - MCU 16-bit 768K Flash
Manufacturer
Freescale Semiconductor
Datasheet
1.S912XEG128J2MAL.pdf
(1324 pages)
Specifications of S912XEP768J5MAGR
Rohs
yes
Core
HCS12X
Processor Series
MC9S12
Data Bus Width
16 bit
Maximum Clock Frequency
50 MHz
Program Memory Size
768 KB
Data Ram Size
48 KB
On-chip Adc
Yes
Operating Supply Voltage
3.3 V to 5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-144
Mounting Style
SMD/SMT
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S912XEP768J5MAGR
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 21 Serial Peripheral Interface (S12SPIV5)
21.3.2.3
Read: Anytime
Write: Anytime; writes to the reserved bits have no effect
The baud rate divisor equation is as follows:
The baud rate can be calculated with the following equation:
768
Module Base +0x0002
SPPR[2:0]
SPR[2:0]
Reset
SPPR2
Field
6–4
2–0
0
0
0
0
0
0
0
0
0
0
0
0
W
R
SPI Baud Rate Preselection Bits — These bits specify the SPI baud rates as shown in
mode, a change of these bits will abort a transmission in progress and force the SPI system into idle state.
SPI Baud Rate Selection Bits — These bits specify the SPI baud rates as shown in
a change of these bits will abort a transmission in progress and force the SPI system into idle state.
Table 21-7. Example SPI Baud Rate Selection (25 MHz Bus Clock) (Sheet 1 of 3)
SPI Baud Rate Register (SPIBR)
0
0
7
For maximum allowed baud rates, please refer to the SPI Electrical
Specification in the Electricals chapter of this data sheet.
SPPR1
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
SPPR2
0
6
Baud Rate = BusClock / BaudRateDivisor
BaudRateDivisor = (SPPR + 1) • 2
SPPR0
0
0
0
0
0
0
0
0
1
1
1
1
Figure 21-5. SPI Baud Rate Register (SPIBR)
MC9S12XE-Family Reference Manual Rev. 1.25
Table 21-6. SPIBR Field Descriptions
SPPR1
0
5
SPR2
0
0
0
0
1
1
1
1
0
0
0
0
SPPR0
NOTE
SPR1
0
4
0
0
1
1
0
0
1
1
0
0
1
1
Description
SPR0
(SPR + 1)
0
0
0
1
0
1
0
1
0
1
0
1
0
1
3
Baud Rate
SPR2
Divisor
0
2
128
256
16
32
64
16
32
2
4
8
4
8
Table
Freescale Semiconductor
SPR1
21-7. In master mode,
0
Table
1
1.5625 Mbit/s
1.5625 Mbit/s
781.25 kbit/s
390.63 kbit/s
195.31 kbit/s
781.25 kbit/s
3.125 Mbit/s
3.125 Mbit/s
97.66 kbit/s
Baud Rate
12.5 Mbit/s
6.25 Mbit/s
6.25 Mbit/s
21-7. In master
Eqn. 21-1
Eqn. 21-2
SPR0
0
0
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