MC9S08SH4CTJ Freescale Semiconductor, MC9S08SH4CTJ Datasheet - Page 259

• Manufacturer Part Number: MC9S08SH4CTJ
• Description: IC MCU 8BIT 4K FLASH 20-TSSOP
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08SH4CTJ

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-TSSOP
• Processor Series: S08SH
• Core: HCS08
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SCI/SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWS08
• Development Tools By Supplier: DEMO9S08SG32, DEMO9S08SG32AUTO, DEMO9S08SG8, DEMO9S08SG8AUTO, DEMO9S08SH32, DEMO9S08SH8
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• A/d Bit Size: 10 bit
• A/d Channels Available: 12
• Height: 1.05 mm
• Length: 6.6 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 4.5 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The output compare value in the TPM channel registers (times 2) determines the pulse width (duty cycle)
of the CPWM signal
CPWM output signal low and a compare occurred while counting down forces the output high. The
counter counts up until it reaches the modulo setting in TPMxMODH:TPMxMODL, then counts down
until it reaches zero. This sets the period equal to two times TPMxMODH:TPMxMODL.
Center-aligned PWM outputs typically produce less noise than edge-aligned PWMs because fewer I/O pin
transitions are lined up at the same system clock edge. This type of PWM is also required for some types
of motor drives.
Input capture, output compare, and edge-aligned PWM functions do not make sense when the counter is
operating in up/down counting mode so this implies that all active channels within a TPM must be used in
CPWM mode when CPWMS=1.
The TPM may be used in an 8-bit MCU. The settings in the timer channel registers are buffered to ensure
coherent 16-bit updates and to avoid unexpected PWM pulse widths. Writes to any of the registers
TPMxMODH, TPMxMODL, TPMxCnVH, and TPMxCnVL, actually write to buffer registers.
In center-aligned PWM mode, the TPMxCnVH:L registers are updated with the value of their write buffer
according to the value of CLKSB:CLKSA bits, so:
When TPMxCNTH:TPMxCNTL=TPMxMODH:TPMxMODL, the TPM can optionally generate a TOF
interrupt (at the end of this count).
Writing to TPMxSC cancels any values written to TPMxMODH and/or TPMxMODL and resets the
coherency mechanism for the modulo registers. Writing to TPMxCnSC cancels any values written to the
channel value registers and resets the coherency mechanism for TPMxCnVH:TPMxCnVL.
Freescale Semiconductor
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If (CLKSB:CLKSA = 0:0), the registers are updated when the second byte is written
If (CLKSB:CLKSA not = 0:0), the registers are updated after the both bytes were written, and the
TPM counter changes from (TPMxMODH:TPMxMODL - 1) to (TPMxMODH:TPMxMODL). If
the TPM counter is a free-running counter, the update is made when the TPM counter changes from
0xFFFE to 0xFFFF.
TPMxMODH:TPMxMODL
TPMxCHn
COUNT=
(Figure
Figure 16-16. CPWM Period and Pulse Width (ELSnA=0)
16-16). If ELSnA=0, a compare occurred while counting up forces the
(COUNT DOWN)
MC9S08SH8 MCU Series Data Sheet, Rev. 3
COMPARE
OUTPUT
2 x TPMxMODH:TPMxMODL
2 x TPMxCnVH:TPMxCnVL
PULSE WIDTH
COUNT= 0
PERIOD
(COUNT UP)
COMPARE
OUTPUT
Chapter 16 Timer/PWM Module (S08TPMV3)
TPMxMODH:TPMxMODL
COUNT=
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