MC9S12C128MFAE Freescale Semiconductor, MC9S12C128MFAE Datasheet - Page 429
![IC MCU 128K FLASH 25MHZ 48-LQFP](/photos/12/20/122066/mc9s12c128mfae_sml.jpg)
MC9S12C128MFAE
Manufacturer Part Number
MC9S12C128MFAE
Description
IC MCU 128K FLASH 25MHZ 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Specifications of MC9S12C128MFAE
Core Processor
HCS12
Core Size
16-Bit
Speed
25MHz
Connectivity
CAN, EBI/EMI, SCI, SPI
Peripherals
POR, PWM, WDT
Number Of I /o
31
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-LQFP
Processor Series
S12C
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
4 KB
Interface Type
CAN/SCI/SPI
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
31
Number Of Timers
8
Operating Supply Voltage
3.3 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
M68EVB912C32EE
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Package
48LQFP
Family Name
HCS12
Maximum Speed
25 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12C128MFAE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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14.4.4
Baud rate generation consists of a series of divider stages. Six bits in the SPI Baud Rate register (SPPR2,
SPPR1, SPPR0, SPR2, SPR1, and SPR0) determine the divisor to the SPI module clock which results in
the SPI baud rate.
The SPI clock rate is determined by the product of the value in the baud rate preselection bits
(SPPR2–SPPR0) and the value in the baud rate selection bits (SPR2–SPR0). The module clock divisor
equation is shown in
When all bits are clear (the default condition), the SPI module clock is divided by 2. When the selection
bits (SPR2–SPR0) are 001 and the preselection bits (SPPR2–SPPR0) are 000, the module clock divisor
becomes 4. When the selection bits are 010, the module clock divisor becomes 8 etc.
When the preselection bits are 001, the divisor determined by the selection bits is multiplied by 2. When
the preselection bits are 010, the divisor is multiplied by 3, etc. See
for all bit conditions, based on a 25-MHz bus clock. The two sets of selects allows the clock to be divided
by a non-power of two to achieve other baud rates such as divide by 6, divide by 10, etc.
Freescale Semiconductor
End of Idle State
SCK Edge Nr.
MSB first (LSBFE = 0):
SCK (CPOL = 0)
SCK (CPOL = 1)
SAMPLE I
MOSI/MISO
CHANGE O
CHANGE O
SEL SS (O)
Master only
SEL SS (I)
t
t
t
MOSI pin
MISO pin
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
SPI Baud Rate Generation
Figure 14-11
tL
1
MSB
LSB
2
Figure 14-10. SPI Clock Format 1 (CPHA = 1)
3
Begin
Bit 6
Bit 1
4
MC9S12C-Family / MC9S12GC-Family
5
Bit 5
Bit 2
6
7
Rev 01.24
Bit 4
Bit 3
8
Transfer
9
Chapter 14 Serial Peripheral Interface (SPIV3) Block Description
Bit 3
Bit 4
10
11
Bit 2
Bit 5
12
Table 14-7
13 14
Bit 1
Bit 6
End
15
MSB
LSB
for baud rate calculations
16
tT
Minimum 1/2 SCK
Begin of Idle State
tI
for t
T
tL
, t
l
, t
L
429
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