MC9S12XET256CAG Freescale Semiconductor, MC9S12XET256CAG Datasheet - Page 713

• Manufacturer Part Number: MC9S12XET256CAG
• Description: MCU 16BIT 256K FLASH 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XET256CAG

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 50MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 119
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.72 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Processor Series: S12XE
• Core: HCS12
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: KIT33812ECUEVME, EVB9S12XEP100, DEMO9S12XEP100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Clock A is used as an input to an 8-bit down counter. This down counter loads a user programmable scale
value from the scale register (PWMSCLA). When the down counter reaches one, a pulse is output and the
Freescale Semiconductor
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
Prescale
Figure 19-18. PWM Clock Select Block Diagram
M
U
X
M
U
X
MC9S12XE-Family Reference Manual Rev. 1.23
8-Bit Down
PWMSCLB
8-Bit Down
PWMSCLA
Counter
Counter
Clock B/2, B/4, B/6,....B/512
Scale
Clock A/2, A/4, A/6,....A/512
Clock B
Clock A
Load
Load
Count = 1
Count = 1
DIV 2
DIV 2
Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
Clock SB
Clock SA
Clock Select
PCLK0
PCLK1
PCLK2
PCLK3
PCLK4
PCLK5
PCLK6
PCLK7
M
M
M
M
M
M
M
M
U
X
U
X
U
X
U
X
U
X
U
X
U
X
U
X
Clock to
PWM Ch 0
Clock to
PWM Ch 1
Clock to
PWM Ch 2
Clock to
PWM Ch 3
Clock to
PWM Ch 4
Clock to
PWM Ch 5
Clock to
PWM Ch 6
Clock to
PWM Ch 7
713